Materiały źródłowe

• #1 Postherpetic neuralgia – Wikipedia

  https://en.wikipedia.org/wiki/Postherpetic_neuralgia

  Postherpetic neuralgia (PHN) is neuropathic pain that occurs due to damage to a peripheral nerve caused by the reactivation of the varicella zoster virus (herpes zoster, also known as shingles). PHN is defined as pain in a dermatomal distribution that lasts for at least 90 days after an outbreak of herpes zoster. […] Postherpetic neuralgia is the most common long-term complication of herpes zoster, and occurs in approximately 20% of patients with shingles. Risk factors for PHN include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus. […] The nerve pain of PHN is thought to result from damage in a peripheral nerve that was affected by the reactivation of the varicella zoster virus.

• #1 Postherpetic neuralgia – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/postherpetic-neuralgia/symptoms-causes/syc-20376588

  Postherpetic neuralgia happens if nerve fibers get damaged during an outbreak of shingles. […] The shingles rash is associated with an inflammation of nerves beneath the skin. […] The chickenpox virus causes shingles. Once you’ve had chickenpox, the virus stays in your body for the rest of your life. The virus can become active again and cause shingles. This risk goes up with age. The risk also rises if something turns down the body’s immune system, such as chemotherapy medicines to treat cancer.

• #2 Postherpetic neuralgia – UpToDate

  https://www.uptodate.com/contents/postherpetic-neuralgia

  Postherpetic neuralgia (PHN) is a condition characterized by focal nerve pain that occurs or persists ≥90 days after the onset of an episode of acute herpes zoster virus reactivation (shingles). […] PHN develops after an episode of acute herpes zoster, a condition caused by reactivation of varicella-zoster virus (VZV). […] The exact cause of the persisting pain in PHN is uncertain. Contributing hypotheses include:

• #2 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  Thus, if left untreated, the memory of pain becomes stronger and more intractable, so early treatment is necessary. […] The factors of pathogenesis estimated from the interviews are as follows. For postherpetic neuralgia, 50% for fatigue, 23.5% for insomnia, 23.5% for abdominal surgery/peritonitis, and 20.6% for immunosuppressants such as steroids. Fatigue and insomnia are the biggest causes of weakening the immune system. […] New meridian therapy is an effective treatment for postherpetic neuralgia.

• #3 Postherpetic Neuralgia: Symptoms, Causes, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/12093-postherpetic-neuralgia

  Postherpetic neuralgia (PHN) results from damage to nerve fibers during shingles infection. The nerve fibers at the skin in the affected area send exaggerated pain signals to your brain. Postherpetic neuralgia means nerve pain after herpes. Shingles is also called herpes zoster. […] A certain percentage of people (20%) who get shingles develop PHN. […] Factors that increase the risk of developing postherpetic neuralgia (PHN) include: Older age: The chance of developing postherpetic neuralgia increases with age. If you’re older and develop shingles, you’re more likely to develop PHN and have longer lasting and more severe pain than a younger person with shingles. […] Severity of your shingles: If you have a severe rash, you have a greater chance of PHN. […] Painful, itchy or tingly feeling before shingles rash: If you had these symptoms in an area of skin a few days before your shingles rash broke out, you are at higher risk of PHN. […] Postherpetic neuralgia (PHN) can last for weeks, months, or in some people, years after the shingles rash goes away. […] Researchers don’t know why some people have severe or long-lasting pain and others do not.

• #3 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #4 Herpes Zoster and Postherpetic Neuralgia: Prevention and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2017/1115/p656.html

  Herpes zoster, or shingles, is caused by reactivation of varicella zoster virus, which causes chickenpox. […] Postherpetic neuralgia is the most common complication, occurring in about one in five patients. It is defined as pain in a dermatomal distribution sustained for at least 90 days after acute herpes zoster. […] Postherpetic neuralgia, the most common complication of herpes zoster, is defined as pain in a dermatomal distribution that is sustained for at least 90 days after the rash. It occurs in approximately 20% of patients with herpes zoster, and 80% of cases occur in patients 50 years or older. Pain is described as burning or electric shocklike and may be associated with allodynia or hyperalgesia. Postherpetic neuralgia is caused by nerve damage secondary to an inflammatory response induced by viral replication within a nerve. […] Risk factors include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus.

• #5 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Initial infection by VZV causes varicella, also known as chicken pox. After resolution of the initial infection, the virus remains dormant in the dorsal sensory ganglia or cranial nerve ganglia of the nervous system. As immunity declines with age, VZV can reactivate, resulting in an acute HZ flare, due to reactivation of the virus. […] The incidence of developing PHN is 10-25%, and increases with age, more severe rash and acute HZ pain, ophthalmic involvement, and presence of prodromal symptoms (pain, dysesthesia, and allodynia). Other risk factors include immunosuppression, diabetes, sensory abnormalities in the affected dermatomes, polyneuropathy, and trauma. […] There is limited evidence that smoking history and female gender may also contribute to increased PHN risk. […] The reactivation of VZV in the sensory ganglia causes inflammation and neuronal destruction.

• #6 Postherpetic neuralgia – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/postherpetic-neuralgia/symptoms-causes/syc-20376588

  Postherpetic neuralgia happens if nerve fibers get damaged during an outbreak of shingles. […] The shingles rash is associated with an inflammation of nerves beneath the skin. […] The chickenpox virus causes shingles. Once you’ve had chickenpox, the virus stays in your body for the rest of your life. The virus can become active again and cause shingles. This risk goes up with age. The risk also rises if something turns down the body’s immune system, such as chemotherapy medicines to treat cancer.

• #7 What Triggers Postherpetic Neuralgia? | Boston Clinical Trials

  https://www.bostontrials.com/what-triggers-postherpetic-neuralgia-symptoms-of-and-risk-factors-to-develop-phn/

  Postherpetic neuralgia (PHN) is a nervous system condition where nerves are damaged following an outbreak of shingles. The nerve fibers are damaged by inflammation caused by shingles, which in turn causes chronic pain that can be quite severe, lasting for months or even years. PHN usually occurs at the site of the shingles rash on your body. You can develop PHN as a result of shingles, but only about 10% of people who get shingles will develop PHN. […] Portherpetic neuralgia is caused by shingles and often requires the help of a pain management doctor for treatment. The nerve pain can be so severe that it has been compared to passing a kidney stone, or even labor. It is considered a complication of shingles. […] The main trigger for shingles is a weakened immune system, as many of the risk factors above show. To prevent shingles, you must do your best to keep your immune system strong, but very often, there is little you can do to stop shingles from developing, especially if you have an autoimmune disorder like Crohn’s disease or lupus. […] Unfortunately, there is no cure for postherpetic neuralgia.

• #8 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #9

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  VZV DNA was detected in the peripheral blood mononuclear cells months to years after the resolution of the zoster rash in patients with PHN, potentially reflecting a higher viral burden in the ganglia than during actual latency. […] TG-PHN, caused by the VZV reactivation, involves intricate changes in pain signaling pathways, leading to heightened pain response through nociceptors sensitization, sensitivity due to local inflammatory mediators, augmented pain pathways excitability, and diminished inhibitory control. […] VZV replication can induce acute injury to sensory neurons, exacerbating inflammatory tissue damage. […] The presence of viral proteins coupled with immune responses initiates inflammation at the affected site and contributes to pain and heightened sensitivity. […] The intricate interplay between heightened inflammation and neuronal activity underscores the complexities of pain modulation.

• #10

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  VZV DNA was detected in the peripheral blood mononuclear cells months to years after the resolution of the zoster rash in patients with PHN, potentially reflecting a higher viral burden in the ganglia than during actual latency. […] TG-PHN, caused by the VZV reactivation, involves intricate changes in pain signaling pathways, leading to heightened pain response through nociceptors sensitization, sensitivity due to local inflammatory mediators, augmented pain pathways excitability, and diminished inhibitory control. […] VZV replication can induce acute injury to sensory neurons, exacerbating inflammatory tissue damage. […] The presence of viral proteins coupled with immune responses initiates inflammation at the affected site and contributes to pain and heightened sensitivity. […] The intricate interplay between heightened inflammation and neuronal activity underscores the complexities of pain modulation.

• #11

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  VZV DNA was detected in the peripheral blood mononuclear cells months to years after the resolution of the zoster rash in patients with PHN, potentially reflecting a higher viral burden in the ganglia than during actual latency. […] TG-PHN, caused by the VZV reactivation, involves intricate changes in pain signaling pathways, leading to heightened pain response through nociceptors sensitization, sensitivity due to local inflammatory mediators, augmented pain pathways excitability, and diminished inhibitory control. […] VZV replication can induce acute injury to sensory neurons, exacerbating inflammatory tissue damage. […] The presence of viral proteins coupled with immune responses initiates inflammation at the affected site and contributes to pain and heightened sensitivity. […] The intricate interplay between heightened inflammation and neuronal activity underscores the complexities of pain modulation.

• #12 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #13 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  One study compared the difference in epidermal axon densities between patients who suffered from PHN and those who had a self-limited occurrence of HZ. […] Those afflicted with PHN had, in most instances, far fewer axons in the relevant dermatomes than non-sufferers. […] Therefore, an anatomical derangement is likely at least partially responsible for the development of PHN. […] Some suggest that an unchecked inflammatory response at the neuronal level is the main culprit of the eventual development of PHN, specifically via the reduction of centrally-mediated inhibition of nociceptive input and the promotion of peripheral sensitization via damaged nociceptors.

• #14 Postherpetic neuralgia: Treatment, symptoms, and causes

  https://www.medicalnewstoday.com/articles/160253

  The nerve damage that is caused by shingles disrupts the proper functioning of the nerve. The faulty nerve becomes confused and sends random, chaotic pain signals to the brain. This can lead to a throbbing, burning pain along the nerve. […] Experts believe that shingles causes scar tissue to form next to the nerves, creating pressure. This causes the nerves to send inaccurate signals, many of them pain signals, to the brain. It is unclear why some patients go on to develop PHN.

• #15 Postherpetic Neuralgia – Sound Pain Alliance Causes & Treatments

  https://www.soundpainalliance.com/conditions/shingle-pain/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. […] Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. Damaged fibers can’t send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that can last months or even years. […] When you have shingles, you might be at greater risk of developing postherpetic neuralgia as a result of: Age. You’re older than 50. Severity of shingles. You had a severe rash and severe pain. Other illness. You have a chronic disease, such as diabetes. Shingles location. You had shingles on your face or torso. Delayed treatment. Your shingles antiviral treatment was delayed for more than 72 hours after your rash appeared.

• #16

  https://journals.lww.com/painrpts/fulltext/2018/12000/rethinking_the_causes_of_pain_in_herpes_zoster_and.1.aspx

  The idea that HZ/PHN results from VZV reactivation in a single DRG is based on 2 related observations: the unilateral dermatomal distribution of symptoms and pathological observations of inflammation and loss of nerve fibers and sensory cell somata in DRGs. […] The striking inconsistencies with inflammation being a prime cause of pain, in PHN in particular, call out for an alternative explanation. […] Pain in PHN is an instance of anesthesia dolorosa. […] The ectopic pacemaker hypothesis of pain in HZ and PHN attempts to interpret the clinical facts surrounding HZ/PHN in light of recent advances in our understanding on the biology of neuropathic pain. […] The ectopic pacemaker hypothesis posits that, in HZ patients who do not go on to develop PHN, inflammation is the principal factor that exacerbates ectopic discharge.

• #17 Postherpetic neuralgia: Treatment, symptoms, and causes

  https://www.medicalnewstoday.com/articles/160253

  The nerve damage that is caused by shingles disrupts the proper functioning of the nerve. The faulty nerve becomes confused and sends random, chaotic pain signals to the brain. This can lead to a throbbing, burning pain along the nerve. […] Experts believe that shingles causes scar tissue to form next to the nerves, creating pressure. This causes the nerves to send inaccurate signals, many of them pain signals, to the brain. It is unclear why some patients go on to develop PHN.

• #18 Postherpetic Neuralgia (PHN) – PainMedSA

  https://painmedsa.com/conditions/postherpetic-neuralgia/

  Postherpetic Neuralgia (PHN) may occur as a complication of shingles when the pain persists for longer than this time or persists after the rash has healed. […] It is not known why some people develop PHN. After a bout of shingles, the affected nerves usually recover however sometimes the nerve damage caused by shingles leads to scar tissue forming next to the nerves. The scar tissue may press on the nerves and cause them to send out involuntary messages of pain to the brain.

• #19 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  This persistence of postherpetic neuralgia pain is due to pain memory from long-term excitation of the nerve junction (called long-term potentiation), combined with proliferation of painful nerve circuits following inflammation of the spinal cord dorsal horn by the virus. […] After 3-4 weeks of shingles, when the pain does not subside, the acute phase of shingles shifts to post-herpetic neuralgia. The mechanism of the transition is that the pain is stored in the dorsal horn of the spinal cord. Once the pain is stored, it becomes resistant to treatment and becomes more intractable the longer it has been present. […] The „ease/difficulty of healing” of shingles is strongly influenced by the time since onset of shingles. […] Dr. Masayoshi Hyodo, Professor of Pain Clinic, Department of Anesthesiology, Osaka Medical College (at the time of the paper), stated, „When pain is still present more than one month after the onset of illness, it is called post-herpetic neuralgia (PHN). Especially when more than three months have passed since the onset of the disease, nerve block therapy no longer yields good results. In particular, nerve block therapy is hopelessly ineffective in patients who have had the disease for more than one year.”

• #20

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Pro-inflammatory cytokines IL-1 and TNF- play a pivotal role by sensitizing nociceptors, influencing pain signaling. […] While VZV infection has conventionally been associated with peripheral effects, the presence of acute or persistent inflammation and nerve damage can lead to enduring modifications in central nervous system (CNS) pain pathways. […] The cascading effects of VZV reactivation on the nervous system create the complex landscape of TG-PHN. […] Understanding the pathogenesis of TG-PHNs is imperative to overcoming the challenges of its clinical management.

• #21

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Pro-inflammatory cytokines IL-1 and TNF- play a pivotal role by sensitizing nociceptors, influencing pain signaling. […] While VZV infection has conventionally been associated with peripheral effects, the presence of acute or persistent inflammation and nerve damage can lead to enduring modifications in central nervous system (CNS) pain pathways. […] The cascading effects of VZV reactivation on the nervous system create the complex landscape of TG-PHN. […] Understanding the pathogenesis of TG-PHNs is imperative to overcoming the challenges of its clinical management.

• #22

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  VZV DNA was detected in the peripheral blood mononuclear cells months to years after the resolution of the zoster rash in patients with PHN, potentially reflecting a higher viral burden in the ganglia than during actual latency. […] TG-PHN, caused by the VZV reactivation, involves intricate changes in pain signaling pathways, leading to heightened pain response through nociceptors sensitization, sensitivity due to local inflammatory mediators, augmented pain pathways excitability, and diminished inhibitory control. […] VZV replication can induce acute injury to sensory neurons, exacerbating inflammatory tissue damage. […] The presence of viral proteins coupled with immune responses initiates inflammation at the affected site and contributes to pain and heightened sensitivity. […] The intricate interplay between heightened inflammation and neuronal activity underscores the complexities of pain modulation.

• #23

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  VZV DNA was detected in the peripheral blood mononuclear cells months to years after the resolution of the zoster rash in patients with PHN, potentially reflecting a higher viral burden in the ganglia than during actual latency. […] TG-PHN, caused by the VZV reactivation, involves intricate changes in pain signaling pathways, leading to heightened pain response through nociceptors sensitization, sensitivity due to local inflammatory mediators, augmented pain pathways excitability, and diminished inhibitory control. […] VZV replication can induce acute injury to sensory neurons, exacerbating inflammatory tissue damage. […] The presence of viral proteins coupled with immune responses initiates inflammation at the affected site and contributes to pain and heightened sensitivity. […] The intricate interplay between heightened inflammation and neuronal activity underscores the complexities of pain modulation.

• #24 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #25 Postherpetic Neuralgia: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/1143066-overview

  Risk factors for the development of PHN include the following: […] Family history has been described as a risk factor for HZ. In a case-control study of 504 patients and 523 controls, Hicks et al found that HZ patients were more likely to report blood relatives with HZ than control subjects were (39% vs 11%). This risk was higher in patients who had multiple blood relatives with HZ than in those who had only one blood relative with HZ. […] The association between age and the development of PHN is strong. Advanced age appears to be the most significant risk factor for PHN. At age 60 years, approximately 60% of patients with shingles develop PHN, and at age 70 years, 75% develop PHN.

• #26 Postherpetic neuralgia – Wikipedia

  https://en.wikipedia.org/wiki/Postherpetic_neuralgia

  Since herpes zoster occurs due to reactivation of the varicella zoster virus, which is more likely to occur with a weakened immune system, both herpes zoster and PHN occur more often in the elderly. […] The incidence of herpes zoster, and also developing postherpetic neuralgia, both increase with age. The frequency and severity of postherpetic neuralgia increase with advancing age, occurring in 20% of people age 60-65 years old who have had herpes zoster, and in more than 30% of people over 80 years old.

• #27 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #28 Postherpetic Neuralgia: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/1143066-overview

  Risk factors for the development of PHN include the following: […] Family history has been described as a risk factor for HZ. In a case-control study of 504 patients and 523 controls, Hicks et al found that HZ patients were more likely to report blood relatives with HZ than control subjects were (39% vs 11%). This risk was higher in patients who had multiple blood relatives with HZ than in those who had only one blood relative with HZ. […] The association between age and the development of PHN is strong. Advanced age appears to be the most significant risk factor for PHN. At age 60 years, approximately 60% of patients with shingles develop PHN, and at age 70 years, 75% develop PHN.

• #29 Postherpetic neuralgia – Wikipedia

  https://en.wikipedia.org/wiki/Postherpetic_neuralgia

  Since herpes zoster occurs due to reactivation of the varicella zoster virus, which is more likely to occur with a weakened immune system, both herpes zoster and PHN occur more often in the elderly. […] The incidence of herpes zoster, and also developing postherpetic neuralgia, both increase with age. The frequency and severity of postherpetic neuralgia increase with advancing age, occurring in 20% of people age 60-65 years old who have had herpes zoster, and in more than 30% of people over 80 years old.

• #30

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #31 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #32 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #33 Postherpetic Neuralgia: Symptoms, Causes, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/12093-postherpetic-neuralgia

  Postherpetic neuralgia (PHN) results from damage to nerve fibers during shingles infection. The nerve fibers at the skin in the affected area send exaggerated pain signals to your brain. Postherpetic neuralgia means nerve pain after herpes. Shingles is also called herpes zoster. […] A certain percentage of people (20%) who get shingles develop PHN. […] Factors that increase the risk of developing postherpetic neuralgia (PHN) include: Older age: The chance of developing postherpetic neuralgia increases with age. If you’re older and develop shingles, you’re more likely to develop PHN and have longer lasting and more severe pain than a younger person with shingles. […] Severity of your shingles: If you have a severe rash, you have a greater chance of PHN. […] Painful, itchy or tingly feeling before shingles rash: If you had these symptoms in an area of skin a few days before your shingles rash broke out, you are at higher risk of PHN. […] Postherpetic neuralgia (PHN) can last for weeks, months, or in some people, years after the shingles rash goes away. […] Researchers don’t know why some people have severe or long-lasting pain and others do not.

• #34 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #35

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #36

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #37 Postherpetic Neuralgia | AAFP

  https://www.aafp.org/pubs/afp/issues/2011/0915/p690.html

  Pain that occurs after resolution of acute herpes zoster infection can be severe. […] The main risk factor for postherpetic neuralgia is increasing age. The condition is uncommon in persons younger than 50 years. However, among persons who have had acute herpes zoster, it develops in 20 percent of those 60 to 65 years of age and in greater than 30 percent of those older than 80 years. […] Postherpetic neuralgia is thought to arise following nerve damage caused by herpes zoster. […] Other risk factors for postherpetic neuralgia are severe pain with herpes zoster, greater rash severity, increased neurologic abnormalities in the affected dermatome (sensory loss), the presence of a prodrome, a more pronounced immune response, and psychosocial factors.

• #38 Postherpetic Neuralgia: Symptoms, Causes, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/12093-postherpetic-neuralgia

  Postherpetic neuralgia (PHN) results from damage to nerve fibers during shingles infection. The nerve fibers at the skin in the affected area send exaggerated pain signals to your brain. Postherpetic neuralgia means nerve pain after herpes. Shingles is also called herpes zoster. […] A certain percentage of people (20%) who get shingles develop PHN. […] Factors that increase the risk of developing postherpetic neuralgia (PHN) include: Older age: The chance of developing postherpetic neuralgia increases with age. If you’re older and develop shingles, you’re more likely to develop PHN and have longer lasting and more severe pain than a younger person with shingles. […] Severity of your shingles: If you have a severe rash, you have a greater chance of PHN. […] Painful, itchy or tingly feeling before shingles rash: If you had these symptoms in an area of skin a few days before your shingles rash broke out, you are at higher risk of PHN. […] Postherpetic neuralgia (PHN) can last for weeks, months, or in some people, years after the shingles rash goes away. […] Researchers don’t know why some people have severe or long-lasting pain and others do not.

• #39 Postherpetic Neuralgia: Nerve Pain After Shingles

  https://www.webmd.com/skin-problems-and-treatments/shingles/understanding-postherpetic-neuralgia-treatment

  Most people who get postherpetic neuralgia are older than 60. […] Women seem to get it more than men. […] People who have numbness, tingling, or itching before a shingles rash even appears tend to get the lingering pain later. […] If you had severe pain or a rash during the beginning of your outbreak, you have a greater chance of the neuralgia later. […] People with ongoing conditions that can weaken the immune system, like HIV and cancer, seem more likely to get it.

• #40 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #41

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Trigeminal postherpetic neuralgia (TG-PHN) is a neuropathic pain condition complicating herpes zoster (HZ) attributed to the trigeminal nerve. […] TG-PHN is one of the most common and complex PHN locations. It has distinguishing clinical and pathophysiological characteristics, starting with viral triggered injuries to the trigeminal ganglion (TG) and peripheral tissue and involving the ascending and descending brain modulation pathways. […] Zosters most common complication is postherpetic neuralgia (PHN), which is the persistent HZ-associated pain that can last for months to years after the rash has cleared, severely impacting the function and quality of life in affected individuals. […] HZ occurring in the ophthalmic distribution (reactivation from TG) poses a higher risk of developing PHN (termed trigeminal postherpetic neuralgia; TG-PHN) compared to HZ in any other distribution (cervical, thoracic, lumbar, or sacral).

• #42

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Trigeminal postherpetic neuralgia (TG-PHN) is a neuropathic pain condition complicating herpes zoster (HZ) attributed to the trigeminal nerve. […] TG-PHN is one of the most common and complex PHN locations. It has distinguishing clinical and pathophysiological characteristics, starting with viral triggered injuries to the trigeminal ganglion (TG) and peripheral tissue and involving the ascending and descending brain modulation pathways. […] Zosters most common complication is postherpetic neuralgia (PHN), which is the persistent HZ-associated pain that can last for months to years after the rash has cleared, severely impacting the function and quality of life in affected individuals. […] HZ occurring in the ophthalmic distribution (reactivation from TG) poses a higher risk of developing PHN (termed trigeminal postherpetic neuralgia; TG-PHN) compared to HZ in any other distribution (cervical, thoracic, lumbar, or sacral).

• #43 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #44 Post Herpetic Neuralgia (of the face) – Vancouver Functional Neurosurgery

  https://drhoney.org/facial-pain/

  Post-herpetic neuralgia (PHN) is caused by nerve damage following a bout of shingles. […] Shingles occurs when the chicken pox virus (varicella zoster) becomes activated for some reason after lying dormant in the body for many years. […] The incidence of PHN following shingles varies with age (more common if you are older) and with location (more common in the face). […] The correct treatment of PHN will often require the ongoing care of a neurologist or pain specialist.

• #45 Postherpetic Neuralgia – Sound Pain Alliance Causes & Treatments

  https://www.soundpainalliance.com/conditions/shingle-pain/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. […] Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. Damaged fibers can’t send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that can last months or even years. […] When you have shingles, you might be at greater risk of developing postherpetic neuralgia as a result of: Age. You’re older than 50. Severity of shingles. You had a severe rash and severe pain. Other illness. You have a chronic disease, such as diabetes. Shingles location. You had shingles on your face or torso. Delayed treatment. Your shingles antiviral treatment was delayed for more than 72 hours after your rash appeared.

• #46 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #47 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #48 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #49 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Initial infection by VZV causes varicella, also known as chicken pox. After resolution of the initial infection, the virus remains dormant in the dorsal sensory ganglia or cranial nerve ganglia of the nervous system. As immunity declines with age, VZV can reactivate, resulting in an acute HZ flare, due to reactivation of the virus. […] The incidence of developing PHN is 10-25%, and increases with age, more severe rash and acute HZ pain, ophthalmic involvement, and presence of prodromal symptoms (pain, dysesthesia, and allodynia). Other risk factors include immunosuppression, diabetes, sensory abnormalities in the affected dermatomes, polyneuropathy, and trauma. […] There is limited evidence that smoking history and female gender may also contribute to increased PHN risk. […] The reactivation of VZV in the sensory ganglia causes inflammation and neuronal destruction.

• #50 Postherpetic neuralgia – Wikipedia

  https://en.wikipedia.org/wiki/Postherpetic_neuralgia

  Postherpetic neuralgia (PHN) is neuropathic pain that occurs due to damage to a peripheral nerve caused by the reactivation of the varicella zoster virus (herpes zoster, also known as shingles). PHN is defined as pain in a dermatomal distribution that lasts for at least 90 days after an outbreak of herpes zoster. […] Postherpetic neuralgia is the most common long-term complication of herpes zoster, and occurs in approximately 20% of patients with shingles. Risk factors for PHN include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus. […] The nerve pain of PHN is thought to result from damage in a peripheral nerve that was affected by the reactivation of the varicella zoster virus.

• #51 Herpes Zoster and Postherpetic Neuralgia: Prevention and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2017/1115/p656.html

  Herpes zoster, or shingles, is caused by reactivation of varicella zoster virus, which causes chickenpox. […] Postherpetic neuralgia is the most common complication, occurring in about one in five patients. It is defined as pain in a dermatomal distribution sustained for at least 90 days after acute herpes zoster. […] Postherpetic neuralgia, the most common complication of herpes zoster, is defined as pain in a dermatomal distribution that is sustained for at least 90 days after the rash. It occurs in approximately 20% of patients with herpes zoster, and 80% of cases occur in patients 50 years or older. Pain is described as burning or electric shocklike and may be associated with allodynia or hyperalgesia. Postherpetic neuralgia is caused by nerve damage secondary to an inflammatory response induced by viral replication within a nerve. […] Risk factors include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus.

• #52 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Initial infection by VZV causes varicella, also known as chicken pox. After resolution of the initial infection, the virus remains dormant in the dorsal sensory ganglia or cranial nerve ganglia of the nervous system. As immunity declines with age, VZV can reactivate, resulting in an acute HZ flare, due to reactivation of the virus. […] The incidence of developing PHN is 10-25%, and increases with age, more severe rash and acute HZ pain, ophthalmic involvement, and presence of prodromal symptoms (pain, dysesthesia, and allodynia). Other risk factors include immunosuppression, diabetes, sensory abnormalities in the affected dermatomes, polyneuropathy, and trauma. […] There is limited evidence that smoking history and female gender may also contribute to increased PHN risk. […] The reactivation of VZV in the sensory ganglia causes inflammation and neuronal destruction.

• #53 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Initial infection by VZV causes varicella, also known as chicken pox. After resolution of the initial infection, the virus remains dormant in the dorsal sensory ganglia or cranial nerve ganglia of the nervous system. As immunity declines with age, VZV can reactivate, resulting in an acute HZ flare, due to reactivation of the virus. […] The incidence of developing PHN is 10-25%, and increases with age, more severe rash and acute HZ pain, ophthalmic involvement, and presence of prodromal symptoms (pain, dysesthesia, and allodynia). Other risk factors include immunosuppression, diabetes, sensory abnormalities in the affected dermatomes, polyneuropathy, and trauma. […] There is limited evidence that smoking history and female gender may also contribute to increased PHN risk. […] The reactivation of VZV in the sensory ganglia causes inflammation and neuronal destruction.

• #54 Postherpetic Neuralgia: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/1143066-overview

  Risk factors for the development of PHN include the following: […] Family history has been described as a risk factor for HZ. In a case-control study of 504 patients and 523 controls, Hicks et al found that HZ patients were more likely to report blood relatives with HZ than control subjects were (39% vs 11%). This risk was higher in patients who had multiple blood relatives with HZ than in those who had only one blood relative with HZ. […] The association between age and the development of PHN is strong. Advanced age appears to be the most significant risk factor for PHN. At age 60 years, approximately 60% of patients with shingles develop PHN, and at age 70 years, 75% develop PHN.

• #55 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Nerve damage starts early in the acute phase of HZ prior to rash onset and may correlate with the severity of painful neuropathy. […] The initial HZ rash resolves typically in 2-4 weeks. Despite treatment, approximately 20% of patients over the age of 60 years will develop persistent pain 6 months after initial onset of the rash. If PHN develops, pain may last for months to years. […] PHN can be treated with either topical or systemic agents. The first line of treatment consists of gabapentinoids, followed by tricyclic antidepressants (TCAs). […] Because the severity of HZ acute pain is a risk factor for the development of PHN, aggressive pain control is an important aspect of treatment. […] Multiple agents are often needed for pain relief and combination treatment has been shown to be more effective than single agents.

• #56 Postherpetic Neuralgia: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/1143066-overview

  Risk factors for the development of PHN include the following: […] Family history has been described as a risk factor for HZ. In a case-control study of 504 patients and 523 controls, Hicks et al found that HZ patients were more likely to report blood relatives with HZ than control subjects were (39% vs 11%). This risk was higher in patients who had multiple blood relatives with HZ than in those who had only one blood relative with HZ. […] The association between age and the development of PHN is strong. Advanced age appears to be the most significant risk factor for PHN. At age 60 years, approximately 60% of patients with shingles develop PHN, and at age 70 years, 75% develop PHN.

• #57 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #58 Postherpetic Neuralgia: Nerve Pain After Shingles

  https://www.webmd.com/skin-problems-and-treatments/shingles/understanding-postherpetic-neuralgia-treatment

  Most people who get postherpetic neuralgia are older than 60. […] Women seem to get it more than men. […] People who have numbness, tingling, or itching before a shingles rash even appears tend to get the lingering pain later. […] If you had severe pain or a rash during the beginning of your outbreak, you have a greater chance of the neuralgia later. […] People with ongoing conditions that can weaken the immune system, like HIV and cancer, seem more likely to get it.

• #59 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #60 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  Nerve damage starts early in the acute phase of HZ prior to rash onset and may correlate with the severity of painful neuropathy. […] The initial HZ rash resolves typically in 2-4 weeks. Despite treatment, approximately 20% of patients over the age of 60 years will develop persistent pain 6 months after initial onset of the rash. If PHN develops, pain may last for months to years. […] PHN can be treated with either topical or systemic agents. The first line of treatment consists of gabapentinoids, followed by tricyclic antidepressants (TCAs). […] Because the severity of HZ acute pain is a risk factor for the development of PHN, aggressive pain control is an important aspect of treatment. […] Multiple agents are often needed for pain relief and combination treatment has been shown to be more effective than single agents.

• #61 Symptoms and Causes of Post Herpetic Neuralgia – Spine Center of Texas

  https://spinecenteroftexas.com/symptoms-and-causes-of-post-herpetic-neuralgia/

  Post-herpetic neuralgia is brought about by the varicella virus after an episode of shingles. No studies have been able to define exactly how this happens. However, some theories have been surmised to help explain this phenomenon. One possibility is that the nerve cells are activated more when injured, thus the exaggerated stimuli response. Another probable reason for this pain may be that the newly grown nerve endings are provoked from the sensory neutrons, altering the central nervous system response. In addition, the virus attack may prompt the body to create chemical mediators in order to fight the inflammation. This may irritate the sensory receptors, which leads to pain. […] The older a person is when they get shingles, the more likely they are to develop post-herpetic neuralgia (PHN). PHNS severity and duration also increases with age. Other risk factors include rash severity and psychological distress at the time of the rash. Studies reveal that caucasians are more likely to develop shingles and PHN than other nationalities.

• #62 Postherpetic Neuralgia – Sound Pain Alliance Causes & Treatments

  https://www.soundpainalliance.com/conditions/shingle-pain/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. […] Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. Damaged fibers can’t send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that can last months or even years. […] When you have shingles, you might be at greater risk of developing postherpetic neuralgia as a result of: Age. You’re older than 50. Severity of shingles. You had a severe rash and severe pain. Other illness. You have a chronic disease, such as diabetes. Shingles location. You had shingles on your face or torso. Delayed treatment. Your shingles antiviral treatment was delayed for more than 72 hours after your rash appeared.

• #63 Postherpetic Neuralgia – Sound Pain Alliance Causes & Treatments

  https://www.soundpainalliance.com/conditions/shingle-pain/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. […] Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. Damaged fibers can’t send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that can last months or even years. […] When you have shingles, you might be at greater risk of developing postherpetic neuralgia as a result of: Age. You’re older than 50. Severity of shingles. You had a severe rash and severe pain. Other illness. You have a chronic disease, such as diabetes. Shingles location. You had shingles on your face or torso. Delayed treatment. Your shingles antiviral treatment was delayed for more than 72 hours after your rash appeared.

• #64 Post-Herpetic Neuralgia | Arizona Pain

  https://arizonapain.com/conditions/post-herpetic-neuralgia/

  Post-herpetic neuralgia may develop after a shingles outbreak. […] The condition occurs when nerves are damaged during a shingles outbreak. […] The result is sharp pain that may be so severe the lightest touch can cause agony. […] Do note that shingles patients who are able to see a physician within the first 72 hours of the signature rash appearing and start a course of antivirals are half as likely to develop post-herpetic neuralgia. […] The vaccine was most effective in people age 60-69 but also provided some protection for older groups. […] Recent research continues to prove the effectiveness of Zostavax in preventing shingles and post-herpetic neuralgia, with protection that lasts for approximately five years. […] A newer shingles vaccination, Shingrix, is proving more effective in clinical trials but does come with an increased risk of side effects at the injection site.

• #65 Post-herpetic neuralgia in Houston – Texas Pain Care

  https://txpain.com/pain-conditions/post-herpetic-neuralgia/

  Post-herpetic neuralgia (PHN) is a complication of the shingles virus, which is also known as herpes zoster. […] Post-herpetic neuralgia is a result of nerve damage during a shingle infection. Depending on the severity of the shingles rash, it could damage nerve fibers in the skin where the rash occurs. The damage causes the nerves to become confused, so they send exaggerated pain signals to the brain. […] About 10% to 20% of people who experience shingles will also develop post-herpetic neuralgia. […] Early treatment is crucial to avoiding post-herpetic neuralgia. Patients who seeked medical care once they first noticed (within three days) the signs and symptoms of the shingles virus and who began treatment were half as likely to develop post-herpetic neuralgia. […] The best way to treat post-herpetic neuralgia is to prevent it from happening in the first place. This means taking advantage of the vaccine if you are at risk for developing the shingles virus. Those who never had chickenpox arent at risk for developing post-herpetic neuralgia. […] There is no standard treatment for post-herpetic neuralgia, as the treatment depends on the severity of the pain symptoms. Post-herpetic neuralgia is difficult to treat, and the best outcomes are generally achieved when multiple treatment options are utilized.

• #66 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  This persistence of postherpetic neuralgia pain is due to pain memory from long-term excitation of the nerve junction (called long-term potentiation), combined with proliferation of painful nerve circuits following inflammation of the spinal cord dorsal horn by the virus. […] After 3-4 weeks of shingles, when the pain does not subside, the acute phase of shingles shifts to post-herpetic neuralgia. The mechanism of the transition is that the pain is stored in the dorsal horn of the spinal cord. Once the pain is stored, it becomes resistant to treatment and becomes more intractable the longer it has been present. […] The „ease/difficulty of healing” of shingles is strongly influenced by the time since onset of shingles. […] Dr. Masayoshi Hyodo, Professor of Pain Clinic, Department of Anesthesiology, Osaka Medical College (at the time of the paper), stated, „When pain is still present more than one month after the onset of illness, it is called post-herpetic neuralgia (PHN). Especially when more than three months have passed since the onset of the disease, nerve block therapy no longer yields good results. In particular, nerve block therapy is hopelessly ineffective in patients who have had the disease for more than one year.”

• #67 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  This persistence of postherpetic neuralgia pain is due to pain memory from long-term excitation of the nerve junction (called long-term potentiation), combined with proliferation of painful nerve circuits following inflammation of the spinal cord dorsal horn by the virus. […] After 3-4 weeks of shingles, when the pain does not subside, the acute phase of shingles shifts to post-herpetic neuralgia. The mechanism of the transition is that the pain is stored in the dorsal horn of the spinal cord. Once the pain is stored, it becomes resistant to treatment and becomes more intractable the longer it has been present. […] The „ease/difficulty of healing” of shingles is strongly influenced by the time since onset of shingles. […] Dr. Masayoshi Hyodo, Professor of Pain Clinic, Department of Anesthesiology, Osaka Medical College (at the time of the paper), stated, „When pain is still present more than one month after the onset of illness, it is called post-herpetic neuralgia (PHN). Especially when more than three months have passed since the onset of the disease, nerve block therapy no longer yields good results. In particular, nerve block therapy is hopelessly ineffective in patients who have had the disease for more than one year.”

• #68 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  This persistence of postherpetic neuralgia pain is due to pain memory from long-term excitation of the nerve junction (called long-term potentiation), combined with proliferation of painful nerve circuits following inflammation of the spinal cord dorsal horn by the virus. […] After 3-4 weeks of shingles, when the pain does not subside, the acute phase of shingles shifts to post-herpetic neuralgia. The mechanism of the transition is that the pain is stored in the dorsal horn of the spinal cord. Once the pain is stored, it becomes resistant to treatment and becomes more intractable the longer it has been present. […] The „ease/difficulty of healing” of shingles is strongly influenced by the time since onset of shingles. […] Dr. Masayoshi Hyodo, Professor of Pain Clinic, Department of Anesthesiology, Osaka Medical College (at the time of the paper), stated, „When pain is still present more than one month after the onset of illness, it is called post-herpetic neuralgia (PHN). Especially when more than three months have passed since the onset of the disease, nerve block therapy no longer yields good results. In particular, nerve block therapy is hopelessly ineffective in patients who have had the disease for more than one year.”

• #69 Postherpetic neuralgia – Wikipedia

  https://en.wikipedia.org/wiki/Postherpetic_neuralgia

  Postherpetic neuralgia (PHN) is neuropathic pain that occurs due to damage to a peripheral nerve caused by the reactivation of the varicella zoster virus (herpes zoster, also known as shingles). PHN is defined as pain in a dermatomal distribution that lasts for at least 90 days after an outbreak of herpes zoster. […] Postherpetic neuralgia is the most common long-term complication of herpes zoster, and occurs in approximately 20% of patients with shingles. Risk factors for PHN include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus. […] The nerve pain of PHN is thought to result from damage in a peripheral nerve that was affected by the reactivation of the varicella zoster virus.

• #70 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #71 Postherpetic Neuralgia: Symptoms, Causes, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/12093-postherpetic-neuralgia

  Postherpetic neuralgia (PHN) results from damage to nerve fibers during shingles infection. The nerve fibers at the skin in the affected area send exaggerated pain signals to your brain. Postherpetic neuralgia means nerve pain after herpes. Shingles is also called herpes zoster. […] A certain percentage of people (20%) who get shingles develop PHN. […] Factors that increase the risk of developing postherpetic neuralgia (PHN) include: Older age: The chance of developing postherpetic neuralgia increases with age. If you’re older and develop shingles, you’re more likely to develop PHN and have longer lasting and more severe pain than a younger person with shingles. […] Severity of your shingles: If you have a severe rash, you have a greater chance of PHN. […] Painful, itchy or tingly feeling before shingles rash: If you had these symptoms in an area of skin a few days before your shingles rash broke out, you are at higher risk of PHN. […] Postherpetic neuralgia (PHN) can last for weeks, months, or in some people, years after the shingles rash goes away. […] Researchers don’t know why some people have severe or long-lasting pain and others do not.

• #72 Postherpetic Neuralgia: Symptoms, Causes, and More

  https://www.healthline.com/health/postherpetic-neuralgia

  Postherpetic neuralgia is a painful complication of shingles that affects the nerves. It results in painful sensations that continue after the rash has healed. […] Postherpetic neuralgia is the most common shingles complication. It occurs when a shingles outbreak damages the nerves. […] According to a 2017 review, about 20% of people who get shingles also develop postherpetic neuralgia. People who are older when they get shingles are more likely to get postherpetic neuralgia. […] Age is a major risk factor for getting both shingles and postherpetic neuralgia. Risk begins to increase at age 50 and rises the older you get. […] Some research suggests that postherpetic neuralgia affects 60% of those 60 or older and 75% of those 70 or older. […] People who have severe pain and rash during shingles also have a higher risk of developing postherpetic neuralgia.

• #73 Postherpetic Neuralgia Diagnosis & Treatment – NYC | Columbia Neurosurgery in New York City

  https://www.neurosurgery.columbia.edu/patient-care/conditions/postherpetic-neuralgia

  Postherpetic neuralgia (PHN) is a neuropathic pain syndrome that occurs following an outbreak of varicella zoster virus (VSV), or shingles. […] This complication of shingles occurs much more frequently in older adults. Less than 10 percent of people younger than 60 develop postherpetic neuralgia after a bout of shingles, while about 40 percent of people older than 60 do. […] Postherpetic neuralgia results when nerve fibers are damaged during an outbreak of shingles. Damaged fibers arent able to send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that may persist for monthsor even yearsin the area where shingles first occurred.

• #74 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #75 Postherpetic Neuralgia: Symptoms, Causes, and More

  https://www.healthline.com/health/postherpetic-neuralgia

  Postherpetic neuralgia is a painful complication of shingles that affects the nerves. It results in painful sensations that continue after the rash has healed. […] Postherpetic neuralgia is the most common shingles complication. It occurs when a shingles outbreak damages the nerves. […] According to a 2017 review, about 20% of people who get shingles also develop postherpetic neuralgia. People who are older when they get shingles are more likely to get postherpetic neuralgia. […] Age is a major risk factor for getting both shingles and postherpetic neuralgia. Risk begins to increase at age 50 and rises the older you get. […] Some research suggests that postherpetic neuralgia affects 60% of those 60 or older and 75% of those 70 or older. […] People who have severe pain and rash during shingles also have a higher risk of developing postherpetic neuralgia.

• #76 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #77 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  A meta-analysis of the risk factors for the development of PHN published in 2016 noted that approximately 13% of patients older than or equal to 50 years of age with HZ would develop PHN. […] The incidence increases with advancing age, which underscores the importance of immunocompetence, as a decrease in cell-mediated immunity is likely already present in those with HZ. […] The association between increasing age and PHN is significant. […] Family history has also been considered a risk factor for herpes zoster. […] There is no sex predilection for postherpetic neuralgia. […] The exact physiology that separates a self-limited zoster outbreak from postherpetic neuralgia is not fully understood. […] Histological examinations of relevant peripheral and central nervous tissue from sufferers of PHN reveal myelin and axon deficiency and atrophy of the dorsal horn in certain instances.

• #78 Frequently Asked Questions About Post Herpetic Neuralgia (PHN) – Shingles Support Society

  https://shinglessupport.org.uk/frequently-asked-questions-about-post-herpetic-neuralgia-phn/

  Over half the 194,000 people with shingles each year (thats the number for England and Wales) are affected by post herpetic neuralgia (PHN). […] PHN happens when the chickenpox virus damages a sensory nerve during the shingles outbreak. The damaged nerve sends abnormal messages or even stops sending them so there is numbness. Sometimes there can be changes in nerves in the spinal cord this is why cutting the affected nerve does not stop the pain of PHN. […] As you get older, your chance of developing PHN increases.

• #79 Postherpetic Neuralgia: Symptoms, Causes, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/12093-postherpetic-neuralgia

  Postherpetic neuralgia (PHN) results from damage to nerve fibers during shingles infection. The nerve fibers at the skin in the affected area send exaggerated pain signals to your brain. Postherpetic neuralgia means nerve pain after herpes. Shingles is also called herpes zoster. […] A certain percentage of people (20%) who get shingles develop PHN. […] Factors that increase the risk of developing postherpetic neuralgia (PHN) include: Older age: The chance of developing postherpetic neuralgia increases with age. If you’re older and develop shingles, you’re more likely to develop PHN and have longer lasting and more severe pain than a younger person with shingles. […] Severity of your shingles: If you have a severe rash, you have a greater chance of PHN. […] Painful, itchy or tingly feeling before shingles rash: If you had these symptoms in an area of skin a few days before your shingles rash broke out, you are at higher risk of PHN. […] Postherpetic neuralgia (PHN) can last for weeks, months, or in some people, years after the shingles rash goes away. […] Researchers don’t know why some people have severe or long-lasting pain and others do not.

• #80 Postherpetic Neuralgia: Symptoms, Causes, and More

  https://www.healthline.com/health/postherpetic-neuralgia

  Doctors typically try to prevent postherpetic neuralgia in people with shingles by treating severe cases. Early treatment may prevent postherpetic neuralgia. […] Two doses of a herpes zoster vaccine called Shingrix reduce the risk of shingles by more than 90%. The vaccine also protects against postherpetic neuralgia. […] Postherpetic neuralgia can last for months to years. Treatment may help reduce pain. […] Postherpetic neuralgia is treatable and preventable. Most pain lessens over time. In rare cases, it can last longer than a year.

• #81

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #82

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #83

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #84 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  This persistence of postherpetic neuralgia pain is due to pain memory from long-term excitation of the nerve junction (called long-term potentiation), combined with proliferation of painful nerve circuits following inflammation of the spinal cord dorsal horn by the virus. […] After 3-4 weeks of shingles, when the pain does not subside, the acute phase of shingles shifts to post-herpetic neuralgia. The mechanism of the transition is that the pain is stored in the dorsal horn of the spinal cord. Once the pain is stored, it becomes resistant to treatment and becomes more intractable the longer it has been present. […] The „ease/difficulty of healing” of shingles is strongly influenced by the time since onset of shingles. […] Dr. Masayoshi Hyodo, Professor of Pain Clinic, Department of Anesthesiology, Osaka Medical College (at the time of the paper), stated, „When pain is still present more than one month after the onset of illness, it is called post-herpetic neuralgia (PHN). Especially when more than three months have passed since the onset of the disease, nerve block therapy no longer yields good results. In particular, nerve block therapy is hopelessly ineffective in patients who have had the disease for more than one year.”

• #85 Postherpetic Neuralgia, Post Herpetic Neuralgia, Post Herpes Zoster Pain Treatment

  https://www.removemypain.com/blog/postherpetic-neuralgia-post-herpetic-neuralgia-post-herpes-zoster-pain-treatment/

  Herpes Zoster infection (Shingles) is caused by the reactivation of the virus which causes chickenpox. If one has had chickenpox before, the virus that causes it remains inside the body in an inactive state till it gets an opportunity to spread once again. The reactivation may happen as one ages or as a result of reduced immunity. The virus spreads along a nerve producing the typical rash of Herpes Zoster in the area supplied by the nerve. Rash generally heals in 2-4 weeks and is accompanied by pain, numbness, itching and altered sensitivity in the area. […] One out of five patients with Herpes Zoster may still have persisting pain after 120 days (90 days as per WHO) of rash onset and this condition is referred to as Postherpetic Neuralgia (PHN). In PHN the nerve cells can get damaged leading to increased excitability and persisting pain. Approximately 50% of patients recover within a year and the course is variable in the remaining. In one study it was observed that the proportion of patients with spontaneous resolution of pain decreased with increasing time since the onset of herpes zoster.

• #86 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  For adults who contracted chickenpox as children, and who therefore have latent VZV, the best strategy to prevent VZV reactivation is to be vaccinated with the live attenuated shingles vaccine (Zostavax; Merck Co, Inc., Whitehouse Station, NJ, USA) approved for use in individuals aged 50 years. […] Although there is some evidence that antiviral therapy may reduce the incidence and severity of PHN, especially when administered early in the disease, the evidence is somewhat inconsistent. […] Tricyclic antidepressants (TCAs), gabapentin, and pregabalin are generally the drugs of first choice for the treatment of PHN. […] Current guidelines recommend treatment of PHN in a hierarchical manner, with calcium channel 2- ligands (gabapentin and pregabalin), TCAs (amitriptyline, nortriptyline, or desipramine), or topical lidocaine patches as first-line drugs; opioids and topical capsaicin patch or cream as second- or third-line treatment options; or combination therapies with different mechanisms of action. […] The safety and tolerability of pharmacologic therapies are important issues to consider as PHN affects primarily an older population.

• #87 Post-Herpetic Neuralgia | Advanced Pain & Spine Management

  https://advancedpainspine.com/conditions/post-herpetic-neuralgia/

  Post-herpetic neuralgia may develop following a shingles outbreak in people who did not receive a chickenpox vaccination as a child. […] When nerves get injured during a shingles infection, the disease develops. Nerves become confused and stop communicating properly between the skin and the brain. […] Its worth noting that shingles patients who consult a doctor within 72 hours of the distinctive rash emerging and begin antiviral treatment are half as likely to develop post-herpetic neuralgia. […] According to the Centers for Disease Control and Prevention (CDC), a clinical trial including thousands of adults aged 60 and up found that Zostavax, the first shingles vaccine, lowered the incidence of shingles by slightly over half (51 percent) and the risk of post-herpetic neuralgia by 67 percent.

• #88 Post-Herpetic Neuralgia | Advanced Pain & Spine Management

  https://advancedpainspine.com/conditions/post-herpetic-neuralgia/

  The Centers for Disease Control and Prevention (CDC) recommends that persons 50 and older obtain the Shingrix vaccine to prevent shingles, even if theyve already had shingles or the earlier Zostavax vaccine. […] According to the CDC, two doses of Shingrix are more than 90% effective in preventing shingles and postherpetic neuralgia.

• #89 Postherpetic Neuralgia Treatment NYC | Pain Management NYC

  https://www.painmanagementnyc.com/nerve-pain/postherpetic-neuralgia/

  Vaccination offers protection against shingles and complications related to shingles. […] If you develop a shingles rash, taking antiviral medication within 72 hours after the rash appears aids in preventing complications. […] The shingles vaccine can prevent both shingles and complications of shingles such as PHN. […] Shingrix is considered 90 percent effective in protecting against shingles and postherpetic neuralgia.

• #90 Post-Herpetic Neuralgia | Arizona Pain

  https://arizonapain.com/conditions/post-herpetic-neuralgia/

  Post-herpetic neuralgia may develop after a shingles outbreak. […] The condition occurs when nerves are damaged during a shingles outbreak. […] The result is sharp pain that may be so severe the lightest touch can cause agony. […] Do note that shingles patients who are able to see a physician within the first 72 hours of the signature rash appearing and start a course of antivirals are half as likely to develop post-herpetic neuralgia. […] The vaccine was most effective in people age 60-69 but also provided some protection for older groups. […] Recent research continues to prove the effectiveness of Zostavax in preventing shingles and post-herpetic neuralgia, with protection that lasts for approximately five years. […] A newer shingles vaccination, Shingrix, is proving more effective in clinical trials but does come with an increased risk of side effects at the injection site.

• #91 Post-herpetic neuralgia

  https://dermnetnz.org/topics/post-herpetic-neuralgia

  It has been suggested that these damaged nerves send fewer signals from the skin to central nervous structures, which leads to neuron hyperexcitability and the constant perception of pain. […] Post-herpetic neuralgia is less severe and lasts a shorter time in vaccinated patients. […] Even with optimum antiviral therapy, 20-30% of herpes zoster patients develop post-herpetic neuralgia. […] Early use of a tricyclic agent may reduce the risk of post-herpetic neuralgia. […] The duration and severity of neuralgia increase with age.

• #92 Post-herpetic neuralgia

  https://dermnetnz.org/topics/post-herpetic-neuralgia

  It has been suggested that these damaged nerves send fewer signals from the skin to central nervous structures, which leads to neuron hyperexcitability and the constant perception of pain. […] Post-herpetic neuralgia is less severe and lasts a shorter time in vaccinated patients. […] Even with optimum antiviral therapy, 20-30% of herpes zoster patients develop post-herpetic neuralgia. […] Early use of a tricyclic agent may reduce the risk of post-herpetic neuralgia. […] The duration and severity of neuralgia increase with age.

• #93 Postherpetic Neuralgia (Nerve Pain After Shingles) | Doctor

  https://patient.info/doctor/postherpetic-neuralgia-pro

  Postherpetic neuralgia (PHN) is the most common complication of herpes zoster (shingles). […] The virus remains dormant in the nerve cell bodies of the asymptomatic host after an initial infection with varicella-zoster virus. […] Reactivation of the latent herpes virus occurs in around 50% of people. It is more common in older people. […] The reasons why post-herpetic neuralgia develops in some people are not clearly understood. Acute cytopathic and inflammatory tissue damage during the initial episode of zoster may lead to long-term changes in peripheral and central sensitisation. […] No treatment has been shown to prevent PHN completely. […] However, there is high-quality evidence that oral antiviral treatments do not reduce the incidence of PHN above placebo. […] The only well-documented means of preventing PHN is the prevention of herpes zoster. […] Vaccination is the most effective way to prevent the occurrence of herpes zoster complications in the elderly, in particular PHN.

• #94 Post-Herpetic Neuralgia | Advanced Pain & Spine Management

  https://advancedpainspine.com/conditions/post-herpetic-neuralgia/

  The Centers for Disease Control and Prevention (CDC) recommends that persons 50 and older obtain the Shingrix vaccine to prevent shingles, even if theyve already had shingles or the earlier Zostavax vaccine. […] According to the CDC, two doses of Shingrix are more than 90% effective in preventing shingles and postherpetic neuralgia.

• #95 Postherpetic neuralgia – UpToDate

  https://www.uptodate.com/contents/postherpetic-neuralgia

  Postherpetic neuralgia (PHN) is a condition characterized by focal nerve pain that occurs or persists ≥90 days after the onset of an episode of acute herpes zoster virus reactivation (shingles). […] PHN develops after an episode of acute herpes zoster, a condition caused by reactivation of varicella-zoster virus (VZV). […] The exact cause of the persisting pain in PHN is uncertain. Contributing hypotheses include:

• #96 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #97 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #98 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #99 Post-herpetic neuralgia

  https://dermnetnz.org/topics/post-herpetic-neuralgia

  Post-herpetic neuralgia describes chronic skin pain in an area previously affected by herpes zoster (shingles). […] Because post-herpetic neuralgia is defined as pain after and caused by, re-activation of the herpes zoster virus, evidence of herpes zoster infection is critical for diagnosis. […] Post-herpetic neuralgia is usually a chronic neuropathic pain with a burning character, but some patients experience sharp stabbing pains. […] The main risk factors for post-herpetic neuralgia are: Older age, Immunosuppression, Severe infection. […] Acute herpes zoster pain is due to direct damage of peripheral nerves by the herpes zoster virus. Ongoing post-herpetic neuralgia is due to slow recovery and the involvement of the central nervous system. […] Research has shown that the nerves or neurones affected by post-herpetic neuralgia are damaged.

• #100 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #101 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  Postherpetic neuralgia is a nerve pain that causes pain memory in the spinal cord and brain as well as nerve pain in the chest and abdomen and the limbs. This pain memory is stored in the spinal cord in as little as 3 weeks after the onset of shingles, when the pain persists. And the more time that passes, the stronger the pain memory becomes and the harder it is to heal. […] Postherpetic neuralgia is one of the most intractable nerve pains. There is no effective treatment for it in Western medicine. As a result, many people suffer with pain. […] Prolonged herpes zoster pain causes postherpetic neuralgia in about 20% of people. The pain is then stored in the peripheral nerves, trigeminal nerve, dorsal horn of the spinal cord, and thalamus of the brain. […] Postherpetic neuralgia is a condition in which the nerve itself spontaneously combusts, causing pain. It is very painful, and in some humans, there are cases of electric shock pain that recurs for a day, once every 20-30 seconds. The pain may include tingling, visceral tightness, and burning pain.

• #102 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #103 What Triggers Postherpetic Neuralgia? | Boston Clinical Trials

  https://www.bostontrials.com/what-triggers-postherpetic-neuralgia-symptoms-of-and-risk-factors-to-develop-phn/

  Postherpetic neuralgia (PHN) is a nervous system condition where nerves are damaged following an outbreak of shingles. The nerve fibers are damaged by inflammation caused by shingles, which in turn causes chronic pain that can be quite severe, lasting for months or even years. PHN usually occurs at the site of the shingles rash on your body. You can develop PHN as a result of shingles, but only about 10% of people who get shingles will develop PHN. […] Portherpetic neuralgia is caused by shingles and often requires the help of a pain management doctor for treatment. The nerve pain can be so severe that it has been compared to passing a kidney stone, or even labor. It is considered a complication of shingles. […] The main trigger for shingles is a weakened immune system, as many of the risk factors above show. To prevent shingles, you must do your best to keep your immune system strong, but very often, there is little you can do to stop shingles from developing, especially if you have an autoimmune disorder like Crohn’s disease or lupus. […] Unfortunately, there is no cure for postherpetic neuralgia.

• #104 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  Postherpetic neuralgia is a nerve pain that causes pain memory in the spinal cord and brain as well as nerve pain in the chest and abdomen and the limbs. This pain memory is stored in the spinal cord in as little as 3 weeks after the onset of shingles, when the pain persists. And the more time that passes, the stronger the pain memory becomes and the harder it is to heal. […] Postherpetic neuralgia is one of the most intractable nerve pains. There is no effective treatment for it in Western medicine. As a result, many people suffer with pain. […] Prolonged herpes zoster pain causes postherpetic neuralgia in about 20% of people. The pain is then stored in the peripheral nerves, trigeminal nerve, dorsal horn of the spinal cord, and thalamus of the brain. […] Postherpetic neuralgia is a condition in which the nerve itself spontaneously combusts, causing pain. It is very painful, and in some humans, there are cases of electric shock pain that recurs for a day, once every 20-30 seconds. The pain may include tingling, visceral tightness, and burning pain.

• #105 Postherpetic Neuralgia – Precision Spine Care – Neurological Pain in Texas

  https://precisionspinecare.com/conditions/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The condition affects nerve fibers and skin, causing burning pain that lasts long after the rash and blisters of shingles disappear. […] The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. Theres no cure, but treatments can ease symptoms. For most people, postherpetic neuralgia improves over time. […] The signs and symptoms of postherpetic neuralgia are generally limited to the area of your skin where the shingles outbreak first occurred most commonly in a band around your trunk, usually on one side of your body. […] Pain that lasts three months or longer after the shingles rash has healed. The associated pain has been described as burning, sharp and jabbing, or deep and aching. […] Sensitivity to light touch: People with the condition often cant bear even the touch of clothing on the affected skin (allodynia). […] Itching and numbness: Less commonly, postherpetic neuralgia can produce an itchy feeling or numbness.

• #106 Postherpetic Neuralgia – Precision Spine Care – Neurological Pain in Texas

  https://precisionspinecare.com/conditions/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The condition affects nerve fibers and skin, causing burning pain that lasts long after the rash and blisters of shingles disappear. […] The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. Theres no cure, but treatments can ease symptoms. For most people, postherpetic neuralgia improves over time. […] The signs and symptoms of postherpetic neuralgia are generally limited to the area of your skin where the shingles outbreak first occurred most commonly in a band around your trunk, usually on one side of your body. […] Pain that lasts three months or longer after the shingles rash has healed. The associated pain has been described as burning, sharp and jabbing, or deep and aching. […] Sensitivity to light touch: People with the condition often cant bear even the touch of clothing on the affected skin (allodynia). […] Itching and numbness: Less commonly, postherpetic neuralgia can produce an itchy feeling or numbness.

• #107 Herpes Zoster and Postherpetic Neuralgia: Prevention and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2017/1115/p656.html

  Herpes zoster, or shingles, is caused by reactivation of varicella zoster virus, which causes chickenpox. […] Postherpetic neuralgia is the most common complication, occurring in about one in five patients. It is defined as pain in a dermatomal distribution sustained for at least 90 days after acute herpes zoster. […] Postherpetic neuralgia, the most common complication of herpes zoster, is defined as pain in a dermatomal distribution that is sustained for at least 90 days after the rash. It occurs in approximately 20% of patients with herpes zoster, and 80% of cases occur in patients 50 years or older. Pain is described as burning or electric shocklike and may be associated with allodynia or hyperalgesia. Postherpetic neuralgia is caused by nerve damage secondary to an inflammatory response induced by viral replication within a nerve. […] Risk factors include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus.

• #108 Postherpetic neuralgia – Medical Services – Yuwa Clinic

  https://yuwa-clinic.com/en/medical_treatment/content04.html

  Postherpetic neuralgia is a nerve pain that causes pain memory in the spinal cord and brain as well as nerve pain in the chest and abdomen and the limbs. This pain memory is stored in the spinal cord in as little as 3 weeks after the onset of shingles, when the pain persists. And the more time that passes, the stronger the pain memory becomes and the harder it is to heal. […] Postherpetic neuralgia is one of the most intractable nerve pains. There is no effective treatment for it in Western medicine. As a result, many people suffer with pain. […] Prolonged herpes zoster pain causes postherpetic neuralgia in about 20% of people. The pain is then stored in the peripheral nerves, trigeminal nerve, dorsal horn of the spinal cord, and thalamus of the brain. […] Postherpetic neuralgia is a condition in which the nerve itself spontaneously combusts, causing pain. It is very painful, and in some humans, there are cases of electric shock pain that recurs for a day, once every 20-30 seconds. The pain may include tingling, visceral tightness, and burning pain.

• #109 Postherpetic Neuralgia – Precision Spine Care – Neurological Pain in Texas

  https://precisionspinecare.com/conditions/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The condition affects nerve fibers and skin, causing burning pain that lasts long after the rash and blisters of shingles disappear. […] The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. Theres no cure, but treatments can ease symptoms. For most people, postherpetic neuralgia improves over time. […] The signs and symptoms of postherpetic neuralgia are generally limited to the area of your skin where the shingles outbreak first occurred most commonly in a band around your trunk, usually on one side of your body. […] Pain that lasts three months or longer after the shingles rash has healed. The associated pain has been described as burning, sharp and jabbing, or deep and aching. […] Sensitivity to light touch: People with the condition often cant bear even the touch of clothing on the affected skin (allodynia). […] Itching and numbness: Less commonly, postherpetic neuralgia can produce an itchy feeling or numbness.

• #110 Postherpetic Neuralgia – Precision Spine Care – Neurological Pain in Texas

  https://precisionspinecare.com/conditions/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The condition affects nerve fibers and skin, causing burning pain that lasts long after the rash and blisters of shingles disappear. […] The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. Theres no cure, but treatments can ease symptoms. For most people, postherpetic neuralgia improves over time. […] The signs and symptoms of postherpetic neuralgia are generally limited to the area of your skin where the shingles outbreak first occurred most commonly in a band around your trunk, usually on one side of your body. […] Pain that lasts three months or longer after the shingles rash has healed. The associated pain has been described as burning, sharp and jabbing, or deep and aching. […] Sensitivity to light touch: People with the condition often cant bear even the touch of clothing on the affected skin (allodynia). […] Itching and numbness: Less commonly, postherpetic neuralgia can produce an itchy feeling or numbness.

• #111 Frequently Asked Questions About Post Herpetic Neuralgia (PHN) – Shingles Support Society

  https://shinglessupport.org.uk/frequently-asked-questions-about-post-herpetic-neuralgia-phn/

  Over half the 194,000 people with shingles each year (thats the number for England and Wales) are affected by post herpetic neuralgia (PHN). […] PHN happens when the chickenpox virus damages a sensory nerve during the shingles outbreak. The damaged nerve sends abnormal messages or even stops sending them so there is numbness. Sometimes there can be changes in nerves in the spinal cord this is why cutting the affected nerve does not stop the pain of PHN. […] As you get older, your chance of developing PHN increases.

• #112 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Immunocompromised patients are at increased risk of VZV reactivation as well as neurological complications. […] PHN occurs in the same dermatomes as the HZ rash, and stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response that accompanied VZV reactivation and migration. […] Patients with PHN experience three major types of pain: 1) constant pain without a stimulus (often described as burning, aching, or throbbing), 2) intermittent pain without a stimulus (often described as stabbing, shooting, or electric shock-like), and 3) pain brought on by a stimulus but is disproportionate to the stimulus (hyperalgesia), enduring for at least 3 months after healing of the HZ-related skin rash. […] The best way to prevent PHN is to avoid infection with VZV.

• #113 Shingles Symptoms and Complications | Shingles (Herpes Zoster) | CDC

  https://www.cdc.gov/shingles/signs-symptoms/index.html

  The most common complication of shingles is long-term nerve pain called postherpetic neuralgia, or PHN. […] PHN occurs where the shingles rash was located, even after the rash clears up. It can last for months or years after the rash goes away. […] Your risk of PHN increases with age. Compared to a younger person with shingles, an older adult with shingles is more likely to develop PHN; and have longer lasting and more severe pain.

• #114 Postherpetic neuralgia: Treatment, symptoms, and causes

  https://www.medicalnewstoday.com/articles/160253

  Postherpetic neuralgia is a painful condition that affects the nerve fibers and skin. It is a complication of shingles, and shingles is a complication of chicken pox. […] If the pain caused by shingles continues after the bout of shingles is over, it is known as post-herpetic neuralgia (PHN). […] PHN is a persistent nerve pain that can occur as a result of shingles. Shingles is caused by the herpes varicella-zoster virus, the virus known to cause chickenpox. After a person recovers from chickenpox, the virus remains inactive in the nervous system. […] Later in life, the herpes varicella-zoster virus may become reactivated, causing shingles. Shingles is an infection of a nerve and the area of skin around it. Usually the nerves of the chest and abdomen on one side of the body are affected.

• #115 Shingles and Postherpetic Neuralgia – Facial Pain AssociationIcon / Teal / print@1xicon-heart@1xicon-plane

  https://www.facepain.org/understanding-facial-pain/diagnosis/postherpetic-neuralgia/

  Shingles and Postherpetic Neuralgia […] Postherpetic neuralgia (PHN) is the most common complication of shingles. PHN is pain resulting from a herpes zoster outbreak (shingles) along the trigeminal nerve. Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. […] Damaged fibers cannot send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic pain. […] PHN typically starts during the shingles outbreak, but lasts after the rash and blisters have healed. […] People over the age of 60 have an increased risk of shingles.

• #116

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Trigeminal postherpetic neuralgia (TG-PHN) is a neuropathic pain condition complicating herpes zoster (HZ) attributed to the trigeminal nerve. […] TG-PHN is one of the most common and complex PHN locations. It has distinguishing clinical and pathophysiological characteristics, starting with viral triggered injuries to the trigeminal ganglion (TG) and peripheral tissue and involving the ascending and descending brain modulation pathways. […] Zosters most common complication is postherpetic neuralgia (PHN), which is the persistent HZ-associated pain that can last for months to years after the rash has cleared, severely impacting the function and quality of life in affected individuals. […] HZ occurring in the ophthalmic distribution (reactivation from TG) poses a higher risk of developing PHN (termed trigeminal postherpetic neuralgia; TG-PHN) compared to HZ in any other distribution (cervical, thoracic, lumbar, or sacral).

• #117 Neuralgia: Causes, Types, Treatment, Outlook

  https://www.healthline.com/health/neuralgia

  Neuralgia is a type of pain caused by a nerve thats irritated or damaged. Causes include shingles and underlying medical conditions such as multiple sclerosis. Treatment will vary depending on the cause. […] Neuralgia causes pain because of disruption of a nerves structure or function. This can happen for many reasons. […] An infection, such as shingles, can affect your nerves. […] Shingles is caused by the same virus as chickenpox. Your likelihood of having shingles increases with age. […] Postherpetic neuralgia occurs as a complication of shingles and may affect any part of the body. […] Neuralgia can occur wherever the outbreak of shingles occurred. […] Because the pain always occurs along the path of a nerve, its usually isolated to one side of the body. […] Postherpetic neuralgia can cause debilitating and lifelong pain.

• #118

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  Trigeminal postherpetic neuralgia (TG-PHN) is a neuropathic pain condition complicating herpes zoster (HZ) attributed to the trigeminal nerve. […] TG-PHN is one of the most common and complex PHN locations. It has distinguishing clinical and pathophysiological characteristics, starting with viral triggered injuries to the trigeminal ganglion (TG) and peripheral tissue and involving the ascending and descending brain modulation pathways. […] Zosters most common complication is postherpetic neuralgia (PHN), which is the persistent HZ-associated pain that can last for months to years after the rash has cleared, severely impacting the function and quality of life in affected individuals. […] HZ occurring in the ophthalmic distribution (reactivation from TG) poses a higher risk of developing PHN (termed trigeminal postherpetic neuralgia; TG-PHN) compared to HZ in any other distribution (cervical, thoracic, lumbar, or sacral).

• #119 Understanding Postherpetic Neuralgia: Symptoms, Causes, and Treatment – Momentum Medicalsend

  https://momentuminjury.com/postherpetic-neuralgia/

  Postherpetic neuralgia is a complication of shingles, a viral infection. This condition can significantly impact a person’s quality of life, affecting their ability to work, engage in daily activities, and enjoy social interactions. […] Postherpetic neuralgia (PHN) is a type of pain that can occur after an individual has had shingles, a viral infection caused by the varicella-zoster virus. PHN is characterized by persistent and often excruciating pain in the area where the shingles rash occurred. […] PHN is believed to be caused by nerve damage or irritation due to the varicella-zoster virus affecting the nerves. […] Postherpetic neuralgia (PHN) is caused by nerve damage during a herpes zoster infection (shingles). After the initial rash and blisters of shingles heal, the virus can remain dormant in the nerve cells. In some individuals, the virus can reactivate and cause persistent nerve pain long after the infection has resolved. […] The exact mechanism behind why some individuals develop PHN while others do not is not fully understood, but it is believed to be related to the damage caused to the nerve fibers by the herpes zoster virus.

• #120 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  PHN treatment continues to remain challenging and frustrating for patients and clinicians alike. While several oral and topical therapies exist for PHN, it has been shown that meaningful analgesia defined as greater than or equal to 50% pain relief, is provided to roughly 11 to 50% of patients, often at the cost of treatment-related adverse events.

• #121 Acute Herpes Zoster and Postherpetic Neuralgia | PM&R KnowledgeNow

  https://now.aapmr.org/acute-herpes-zoster-and-post-herpetic-neuralgia/

  PHN treatment continues to remain challenging and frustrating for patients and clinicians alike. While several oral and topical therapies exist for PHN, it has been shown that meaningful analgesia defined as greater than or equal to 50% pain relief, is provided to roughly 11 to 50% of patients, often at the cost of treatment-related adverse events.

• #122 Postherpetic Neuralgia: Nerve Pain After Shingles

  https://www.webmd.com/skin-problems-and-treatments/shingles/understanding-postherpetic-neuralgia-treatment

  Postherpetic neuralgia starts out with a very familiar illness: chickenpox. The virus that causes it is called varicella-zoster. Once chickenpox has run its course, the virus hides out in your nervous system. […] Doctors arent sure exactly why, but sometimes the virus reactivates decades later and travels along pathways to your skin. A painful, blistering rash can erupt. Thats shingles. […] In some cases, shingles can damage your nerves so that they cant send messages from your skin to your brain as they usually do. That scramble of signals can trigger the ongoing pain of neuralgia. […] If the pain lasts more than a year, it can become permanent. […] About 1 out of 5 people who have shingles will have these sharp, ongoing pains afterward. Certain things can increase your chances of getting it:

• #123 Postherpetic Neuralgia: Symptoms, Causes, and More

  https://www.healthline.com/health/postherpetic-neuralgia

  Doctors typically try to prevent postherpetic neuralgia in people with shingles by treating severe cases. Early treatment may prevent postherpetic neuralgia. […] Two doses of a herpes zoster vaccine called Shingrix reduce the risk of shingles by more than 90%. The vaccine also protects against postherpetic neuralgia. […] Postherpetic neuralgia can last for months to years. Treatment may help reduce pain. […] Postherpetic neuralgia is treatable and preventable. Most pain lessens over time. In rare cases, it can last longer than a year.

• #124 Postherpetic neuralgia – UpToDate

  https://www.uptodate.com/contents/postherpetic-neuralgia

  Postherpetic neuralgia (PHN) is a condition characterized by focal nerve pain that occurs or persists ≥90 days after the onset of an episode of acute herpes zoster virus reactivation (shingles). […] PHN develops after an episode of acute herpes zoster, a condition caused by reactivation of varicella-zoster virus (VZV). […] The exact cause of the persisting pain in PHN is uncertain. Contributing hypotheses include:

• #125 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  Herpes zoster, also known as shingles, is a distinctive clinical condition caused by the reactivation of latent varicella zoster (chickenpox) virus following an initial infection. […] Postherpetic neuralgia is a neuropathic pain syndrome characterized by pain that persists for months to years after resolution of the herpes zoster rash. It stems from damage to peripheral and central neurons that may be a byproduct of the immune/inflammatory response accompanying varicella zoster virus reactivation. […] The frequency and severity of PHN increase with advancing age, occurring in 20% of people aged 60-65 years who have had acute HZ, and in more than 30% of people aged 80 years. […] In addition to age, risk factors for developing PHN after HZ include the presence of a prodrome (defined as pain and/or abnormal sensations before rash onset), severe rash (defined as 50 lesions: papules, vesicles, or crusted vesicles), and severe pain during the acute phase.

• #126 Postherpetic Neuralgia – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493198/

  Postherpetic neuralgia (PHN) is the most common long-term complication of varicella-zoster virus (VZV) reactivation. […] The VZV is a double-stranded DNA virus. It lays dormant in the ganglia of certain peripheral and central nerves after an episode of varicella resolves, generally in youth, with the immune system of the host eradicating the virus in most locations within the body. Advancing age combined with a decrease in immunocompetence, usually accompanied by a psychological or physical stressor, may result in reactivation of the dormant/latent VZV as HZ. […] Well-established risk factors for an acute HZ episode progressing to PHN include age, severe immunosuppression, the presence of a prodromal phase, severe pain during zoster outbreak, allodynia, ophthalmic involvement, and diabetes mellitus.

• #127 Herpes Zoster and Postherpetic Neuralgia: Prevention and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2017/1115/p656.html

  Herpes zoster, or shingles, is caused by reactivation of varicella zoster virus, which causes chickenpox. […] Postherpetic neuralgia is the most common complication, occurring in about one in five patients. It is defined as pain in a dermatomal distribution sustained for at least 90 days after acute herpes zoster. […] Postherpetic neuralgia, the most common complication of herpes zoster, is defined as pain in a dermatomal distribution that is sustained for at least 90 days after the rash. It occurs in approximately 20% of patients with herpes zoster, and 80% of cases occur in patients 50 years or older. Pain is described as burning or electric shocklike and may be associated with allodynia or hyperalgesia. Postherpetic neuralgia is caused by nerve damage secondary to an inflammatory response induced by viral replication within a nerve. […] Risk factors include older age, severe prodrome or rash, severe acute zoster pain, ophthalmic involvement, immunosuppression, and chronic conditions such as diabetes mellitus and lupus.

• #128

  https://link.springer.com/article/10.1007/s11916-023-01209-z

  The PHN resolves within 1 year in the majority of patients (up to 78%) but may persist for 210 years in 2246% and indefinitely in others. […] Many risk factors are associated with the development of TG-PHN following HZ, including demographics and zoster features. […] The incidence of PHN increases with advancing age and ranges from 1.6 cases/100,000/year before 10 years of age to 228.5 cases/100,000/year in patients 71 years of age and older. […] PHN complicates over 40% of HZ cases in individuals over 60 years of age, and it is approximately five times more common in those aged 65 and above, compared to the rest of the population. […] In a cohort of HZO patients, 28% exhibited a severe skin eruption significantly associated with a higher occurrence of PHN. […] Severe HZ pain at presentation, including HZO, was independently associated with risk of PHN.

• #129 Postherpetic Neuralgia – Sound Pain Alliance Causes & Treatments

  https://www.soundpainalliance.com/conditions/shingle-pain/postherpetic-neuralgia/

  Postherpetic neuralgia is the most common complication of shingles. The chickenpox (herpes zoster) virus causes shingles. The risk of postherpetic neuralgia increases with age, primarily affecting people older than 60. […] Postherpetic neuralgia occurs if your nerve fibers are damaged during an outbreak of shingles. Damaged fibers can’t send messages from your skin to your brain as they normally do. Instead, the messages become confused and exaggerated, causing chronic, often excruciating pain that can last months or even years. […] When you have shingles, you might be at greater risk of developing postherpetic neuralgia as a result of: Age. You’re older than 50. Severity of shingles. You had a severe rash and severe pain. Other illness. You have a chronic disease, such as diabetes. Shingles location. You had shingles on your face or torso. Delayed treatment. Your shingles antiviral treatment was delayed for more than 72 hours after your rash appeared.

• #130 Postherpetic neuralgia: epidemiology, pathophysiology, and pain management pharmacology

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5036669/

  For adults who contracted chickenpox as children, and who therefore have latent VZV, the best strategy to prevent VZV reactivation is to be vaccinated with the live attenuated shingles vaccine (Zostavax; Merck Co, Inc., Whitehouse Station, NJ, USA) approved for use in individuals aged 50 years. […] Although there is some evidence that antiviral therapy may reduce the incidence and severity of PHN, especially when administered early in the disease, the evidence is somewhat inconsistent. […] Tricyclic antidepressants (TCAs), gabapentin, and pregabalin are generally the drugs of first choice for the treatment of PHN. […] Current guidelines recommend treatment of PHN in a hierarchical manner, with calcium channel 2- ligands (gabapentin and pregabalin), TCAs (amitriptyline, nortriptyline, or desipramine), or topical lidocaine patches as first-line drugs; opioids and topical capsaicin patch or cream as second- or third-line treatment options; or combination therapies with different mechanisms of action. […] The safety and tolerability of pharmacologic therapies are important issues to consider as PHN affects primarily an older population.

• #131 Postherpetic Neuralgia Treatment NYC | Pain Management NYC

  https://www.painmanagementnyc.com/nerve-pain/postherpetic-neuralgia/

  Vaccination offers protection against shingles and complications related to shingles. […] If you develop a shingles rash, taking antiviral medication within 72 hours after the rash appears aids in preventing complications. […] The shingles vaccine can prevent both shingles and complications of shingles such as PHN. […] Shingrix is considered 90 percent effective in protecting against shingles and postherpetic neuralgia.

• #132 Post-herpetic neuralgia

  https://dermnetnz.org/topics/post-herpetic-neuralgia

  It has been suggested that these damaged nerves send fewer signals from the skin to central nervous structures, which leads to neuron hyperexcitability and the constant perception of pain. […] Post-herpetic neuralgia is less severe and lasts a shorter time in vaccinated patients. […] Even with optimum antiviral therapy, 20-30% of herpes zoster patients develop post-herpetic neuralgia. […] Early use of a tricyclic agent may reduce the risk of post-herpetic neuralgia. […] The duration and severity of neuralgia increase with age.

Zobacz więcej