Materiały źródłowe

• #1 Cold sore – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/cold-sore/symptoms-causes/syc-20371017

  Cold sores are usually caused by herpes simplex virus type 1 (HSV-1), and less commonly herpes simplex virus type 2 (HSV-2). […] Cold sores are caused by certain strains of the herpes simplex virus (HSV). HSV-1 usually causes cold sores. HSV-2 is often the cause of genital herpes. But either type can spread to the face or genitals through close contact, such as kissing or oral sex. Shared eating utensils, razors and towels can also spread HSV-1. […] Once you’ve had a herpes infection, the virus can hide in nerve cells in the skin and may cause another cold sore at the same place as before. A return of cold sores may be triggered by: Viral infection or fever, Hormonal changes, such as those related to a menstrual period, Stress, Fatigue, Being in the sun or wind, Changes in the immune system, Injury to the skin.

• #1 Cold sore – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/cold-sore/symptoms-causes/syc-20371017

  Many people who are infected with the virus that causes cold sores never develop symptoms. […] The problem is people can spread the herpes virus whether they develop cold sores or not. Herpes virus spreads through physical contact like kissing, sharing a toothbrush even sharing a drinking glass or through sexual contact. […] Since the number of people who are infected but don’t have symptoms vastly outnumber the people who are infected and have symptoms, most new transmissions occur from people who have no idea that they are infected.

• #2 Cold Sore: Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/symptoms/cold-sores

  Cold sores are painful bumps that form on or around your lips when you have an oral herpes infection. Once you catch oral herpes, the virus stays in your body for life. From time to time, it may reactivate, causing a cold sore outbreak. […] A cold sore (also called a fever blister) is a skin blister associated with a herpes simplex virus (HSV) infection. Cold sores typically form on your lips or the skin around your mouth. […] Cold sores themselves are a symptom of an oral herpes infection. This means the herpes simplex virus (HSV) entered your body at some point in your life and took up residence in your nerve cells. HSV stays dormant (latent, or asleep) in the nerves in your head and periodically reactivates, leading to cold sores. […] A herpes simplex virus (HSV) infection causes cold sores. There are two types of HSV (HSV-1 and HSV-2). HSV-1 causes most cases of oral herpes, the infection that leads to cold sores. But HSV-2 can also cause oral herpes and related cold sores.

• #2 Cold Sore: Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/symptoms/cold-sores

  Many different things can trigger cold sores. Sickness, stress, sun exposure, trauma to your mouth area and hormonal changes (like during menstruation or pregnancy) are just a few examples. Knowing your triggers can help you avoid some outbreaks. But outbreaks can also happen unpredictably. […] Yes, theyre very contagious. Contact with someone elses cold sore can cause you to develop an HSV infection. The location of the infection depends on which part of your body touches the cold sore. […] Cold sores are contagious from when you first notice tingling or other skin symptoms (prodromal stage) until they completely heal. […] Cold sores are most infectious within 24 hours of when they first form. Infectious refers to how much of a germ (in this case, HSV) you need to be exposed to in order to get sick.

• #3 Cold sores – causes, symptoms and treatment | healthdirect

  https://www.healthdirect.gov.au/cold-sores

  Cold sores are caused by the herpes simplex virus. […] Cold sores are caused by a virus called herpes simplex. […] There are 2 types of herpes simplex virus. Cold sores are usually caused by the herpes simplex virus type 1 (HSV-1). […] Various factors can cause the virus to become active resulting in one or more cold sores. […] They can include: fatigue, periods (menstruation), emotional upset or stress, damage to the skin from strong sunlight, cold or wind, illness.

• #4 What Causes Cold Sores And The Most Common SymptomsVector

  https://www.webdoctor.ie/cold-sore-treatments/what-causes-cold-sores/

  Although cold sores are extremely common, many people may not know that they are caused by a virus called herpes simplex virus (HSV for short). There are two different types of HSV, both of which can cause cold sores. […] Type 1 (HSV 1) is thought to be responsible for more than 90% of cold sores, while Type 2 (HSV 2) generally causes genital herpes but it can also cause cold sores if it infects the skin around the mouth. […] Herpes simplex virus is highly contagious and is spread through skin-to-skin contact. Unfortunately, there is no cure for HSV just yet, so if you have had one cold sore, it’s likely that you will have more. This is because the virus that caused the first cold sore will lie dormant in the nerve cells in that area of your skin (usually around the lips). This means that it can potentially cause infection again in the future. It also means that you’re likely to experience cold sores in the same spot during each flare-up.

• #5 Cold sore | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/mouth/cold-sore/

  Cold sores are usually caused by the herpes simplex virus type 1 (HSV-1). […] In most cases, the virus is passed on in early childhood. For example, when a child is kissed by a family member or friend with a cold sore. […] The virus passes through the skin and travels up the nerves, where it lies inactive (dormant) until its triggered at a later date. […] Sometimes, cold sores can be caused by the herpes simplex virus type 2 (HSV-2). […] This can happen after having oral sex with someone who has genital herpes, which is usually caused by HSV-2.

• #6 Overview: Cold sores – InformedHealth.org – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK525782/

  Cold sores are caused by herpes simplex viruses. There are two types of herpes simplex viruses, known as type 1 and type 2. Cold sores are usually caused by herpes simplex type 1. […] The herpes virus is spread through the fluid in the blisters or open sores, for instance through kissing, but also through objects or fingers that touch your mouth. It can also be spread during oral sex. The viruses may be passed on from your mouth to a sexual partner’s genital area. Type 1 herpes viruses can also cause genital herpes this way. […] The blisters mainly appear when the immune system is weakened or under strain, possibly because of a cold or fever. Physical strain, stress and hormonal fluctuations are also thought to be possible triggers, as well as skin irritation around the lips due to sunlight or intense kissing, for example. But it still isnt clear why some people keep getting cold sores and others dont.

• #7

  https://www.who.int/news-room/fact-sheets/detail/herpes-simplex-virus

  An estimated 3.8 billion people under age 50 (64%) globally have herpes simplex virus type 1 (HSV-1) infection, the main cause of oral herpes. […] An estimated 520 million people aged 15-49 (13%) worldwide have herpes simplex virus type 2 (HSV-2) infection, the main cause of genital herpes. […] Type 1 (HSV-1) mostly spreads by oral contact and causes infections in or around the mouth (oral herpes or cold sores). […] Type 2 (HSV-2) spreads by sexual contact and causes genital herpes. […] HSV-1 is mainly transmitted via contact with the virus in sores, saliva or skin surfaces in or around the mouth. […] HSV-2 is mainly transmitted during sex through contact with genital or anal surfaces, skin, sores or fluids of someone infected with the virus. […] HSV-2 infection increases the risk of acquiring HIV infection by approximately three-fold. […] In immunocompromised people, including those with advanced HIV infection, herpes can have more severe symptoms and more frequent recurrences. […] Neonatal herpes can occur when an infant is exposed to HSV during delivery.

• #8 Symptoms: Cold Sore | MD Live

  https://www.mdlive.com/blog/cold-sore

  It is estimated that over 3.7 billion people under 50 (67% of the worlds population) are infected with the virus that typically causes cold sores. […] Cold sores are caused by the herpes simplex virus (HSV-1 and HSV-2), which can lie dormant in your skins nerve cells for years before a cold sore appears. You can contract the HSV virus through close contact or sharing anything (i.e., eating utensils, towels, drinking glasses) with someone who has the virus. […] Once you have the virus in your body, cold sores can be triggered by many factors, including: […] The herpes simplex virus stays in your body forever, which means there is no cure for cold sores.

• #9 Cold sores | Better Health Channel

  https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/cold-sores

  Cold sores are blisters around the mouth and nose, caused by the herpes simplex virus. […] They are caused by infection with the herpes simplex virus (HSV). People are usually infected in childhood or young adulthood, and the infection persists for life. […] Around one-third of infected people experience cold sores, which are a recurrence of the earlier infection and do not indicate recent infection. […] In some people the HSV infection causes cold sores, which erupt following a trigger event such as a cold. This explains the term cold sore. Other triggers that may cause an attack of cold sores include: […] It is important to remember that cold sores are a symptom of ongoing infection rather than a new infection. The sores usually recur in the same place. […] Cold sores around the mouth (often called oral herpes) are generally caused by HSV-1. Most cases of genital herpes are caused by HSV-2. […] HSV spreads between people, usually through contact with saliva or direct contact with a blister. […] Sometimes, people can pass the virus to others when they have no symptoms. This is because the virus may be lying dormant in the skin cells of the lips.

• #10 Cold Sores: MedlinePlus

  https://medlineplus.gov/coldsores.html

  Cold sores are caused by a contagious virus called herpes simplex virus (HSV). […] Type 1 usually causes oral herpes, or cold sores. […] Type 1 herpes virus infects more than half of the U.S. population by the time they reach their 20s. […] Some people have no symptoms from the infection. But others develop painful and unsightly cold sores.

• #11 Cold sores

  https://www.nhs.uk/conditions/cold-sores/

  Cold sores are caused by a virus called herpes simplex. […] Most people are exposed to the virus when they’re children after close skin to skin contact, such as kissing, with someone who has a cold sore. […] Once you have the virus, it stays in your skin for the rest of your life. Sometimes it causes a cold sore.

• #12 Herpes Simplex Virus (HSV): Types Symptoms, & Treatment

  https://my.clevelandclinic.org/health/diseases/22855-herpes-simplex

  Herpes simplex virus (HSV) causes oral herpes, genital herpes and infections in other areas of your body. […] HSV is highly contagious. It spreads from person to person through skin-to-skin contact. A herpes simplex infection occurs when the virus enters your body through your skin and mucous membranes (mucosa). The virus uses your cells to make copies of itself (replication). […] Once you’re infected, the virus stays in your body for life. It’s usually asleep (dormant) but may wake up (reactivate) and cause outbreaks. How HSV affects you depends on many factors, including the specific virus type and your overall health. […] You catch HSV through direct contact with someone who has an HSV infection. This means part of your body needs to touch someone else’s: Herpes sores (oral or genital).

• #12 Herpes Simplex Virus (HSV): Types Symptoms, & Treatment

  https://my.clevelandclinic.org/health/diseases/22855-herpes-simplex

  Someone with HSV doesn’t transmit (or shed) the virus from every part of their body. They only shed it from the area that’s infected. […] Triggers that may cause an oral or genital herpes outbreak include: Fever. […] Outbreaks can also occur randomly without any obvious trigger. […] The incubation period for herpes simplex infections ranges from one to 26 days but is typically six to eight days. This is how long it takes for you to develop symptoms after first getting infected with HSV.

• #13 Cold Sores Treatment, Causes, Pictures & Prevention

  https://www.emedicinehealth.com/cold_sores/article_em.htm

  Cold sores are small, painful, fluid-filled blisters or sores that appear on the lips, mouth, or nose that are caused by a virus. The virus that causes cold sores is known as the herpes simplex virus (HSV). There are two types of HSV, type I and type II. Cold sores are usually caused by type I. […] Herpes simplex is a contagious oral virus. The virus is spread from person to person by kissing or another close contact with sores or even from contact with apparently normal skin that is shedding the virus. Infected saliva is also a means of spreading the virus. […] After the first infection, the virus enters the nerve cells and travels up the nerve until it comes to a place called a ganglion, which is a collection of nerve cells. There, it resides quietly in a stage that is called „dormant” or „latent.” In more active stages, the virus starts multiplying again and travels down the nerve to the skin, causing blisters on the lips known as cold sores. The exact way this happens is not clear, but it is known that some conditions seem to be associated with recurrences, including fever, colds, or the flu (this is why some people call them „fever blisters”); ultraviolet radiation (exposure to the sun); stress; changes in the immune system; hormonal changes, such as menstruation; and trauma to the skin.

• #14 Cold Sores (HSV-1) (for Teens) | Nemours KidsHealth

  https://kidshealth.org/en/teens/cold-sores.html

  Cold sores are small painful blisters that form on or near the lips or nose. […] The herpes simplex virus type 1 (HSV-1) causes cold sores. It’s contagious and spreads easily from one person to another. […] After someone has had cold sores, the virus can quietly stay in their body for a long time without causing symptoms. Later, symptoms can happen again because of things like: other infections, a fever, sunlight, cold weather, periods, stress, like before a big test at school. […] People can get HSV-1 by kissing or touching someone with cold sores or by sharing eating utensils (like forks, spoons, and chopsticks), towels, or other items with a person who has the virus.

• #15 Cold Sores (HSV-1) (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/cold-sores.html

  Cold sores are small painful blisters that can form on or near the lips or nose. […] The herpes simplex virus type 1 (HSV-1) causes cold sores. It’s contagious and spreads easily from one person to another. […] After a child has had cold sores, the virus can quietly stay in their body for a long time without causing symptoms. Later, symptoms can happen again because of things like: other infections, a fever, sunlight, cold weather, periods, stress, like before a big test at school. […] Kids can get HSV-1 by kissing or touching someone with cold sores or by sharing eating utensils (like forks, spoons, and chopsticks), towels, or other items with a person who has the virus.

• #16 Cold Sores: Causes, Symptoms, Treatment, Complications, and Prevention

  https://www.webmd.com/skin-problems-and-treatments/understanding-cold-sores-basics

  A cold sore is a group of tiny, painful blisters caused by the herpes simplex virus (HSV). […] You catch HSV when you come into contact with people or things that carry the virus. For instance, you can get it from kissing someone who has the virus or from sharing eating utensils, towels, or razors. […] Two types of the virus can cause cold sores: HSV-1 and HSV-2. Both types can also cause sores on your genitals and can be spread by oral sex. […] Type 1 usually causes cold sores, and type 2 mostly causes genital herpes, but either can be found in both areas. […] Certain things can trigger an outbreak, including: Some foods, Stress, Fever, Colds, Allergies, Fatigue, Sunburn or being in strong sunlight, Dental work or cosmetic surgery, Your period.

• #17 Cold sore – Wikipedia

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

  Cold sores are the result of the virus reactivating in the body. Once HSV-1 has entered the body, it never leaves. The virus moves from the mouth to remain latent in the central nervous system. In approximately one-third of people, the virus can „wake up” or reactivate to cause disease. When reactivation occurs, the virus travels down the nerves to the skin where it may cause blisters (cold sores) around the lips or mouth area. […] Herpes labialis infection occurs when the herpes simplex virus comes into contact with oral mucosal tissue or abraded skin of the mouth. Infection by the type 1 strain of herpes simplex virus (HSV-1) is most common; however, cases of oral infection by the type 2 strain are increasing. […] Cold sore outbreaks may be influenced by stress, menstruation, sunlight, sunburn, fever, dehydration, or local skin trauma. Surgical procedures such as dental or neural surgery, lip tattooing, or dermabrasion are also common triggers. HSV-1 can in rare cases be transmitted to newborn babies by family members or hospital staff who have cold sores; this can cause a severe disease called neonatal herpes simplex.

• #18 Cold Sore Causes, Stages & Treatment Tips| Compeed®

  https://www.compeed.co.uk/cold-sore-what-you-need-to-know/

  After the first infection, the virus lays dormant inside the nerve cells of your face for the rest of your life. […] A wide variety of internal and external triggers may lead to the virus transforming from dormant state to rapidly increasing number, leading to an outbreak of cold sores. […] Knowing what triggers an outbreak for you is an important step to manage your cold sore outbreaks.

• #19 UVA IDs Trigger for Those Annoying Cold Sore Flare-ups

  https://newsroom.uvahealth.com/2025/02/27/researchers-id-trigger-for-those-annoying-cold-sore-flare-ups/

  Once HSV-1 makes its way into our bodies, it stays forever. […] But stress, other infections and even sunburns are known to cause it to flare. […] The researchers found that while the virus can make a protein called UL12.5 to reactivate, the protein was not needed in the presence of another infection. […] We were surprised to find that HSV-1 doesnt just passively wait for the right conditions to reactivate it actively senses danger and takes control of the process, researcher Patryk Krakowiak said. […] With the new understanding of how herpes flares can be triggered, scientists may be able to target the protein to prevent them, the researchers say. […] Currently, there are no therapies that can prevent the virus from waking up from dormancy, and this stage was thought to only use host proteins.

• #20 Cold Sores | Cedars-Sinai

  https://www.cedars-sinai.org/health-library/diseases-and-conditions/c/cold-sores.html

  Cold sores are caused by the herpes simplex virus. […] Cold sores are caused by the herpes simplex virus. Once this virus is in you, it can cause outbreaks of cold sores. Cold sore outbreaks are often triggered by exposure to the sun, cold wind, a cold or other illness, a weak immune system, changing hormone levels, or even stress. […] The long-term use of oral antiviral medicines may prevent cold sores, but the benefit is very small. This approach is usually used only for people who get frequent and painful cold sores.

• #21 Cold sore triggers, symptoms & treatment | HealthPartners Blog

  https://www.healthpartners.com/blog/cold-sore-treatments/

  Cold sores are caused by the herpes simplex virus, or HSV. […] Cold sores are caused by the herpes simplex virus (HSV), or more specifically, a strain of HSV known as HSV-1. […] There is currently no cure for HSV. Once you have the virus, it stays in your body for life and lies dormant in your nerve cells. […] A cold sore trigger is anything that causes the herpes simplex virus to flare up inside your body. […] Cold sore outbreaks can be triggered by: […] Exposure to extreme weather, whether its very cold or very hot outside, can trigger cold sores. […] When your immune system is trying to fight off other illnesses, like the common cold or the yearly flu, it doesnt have as many resources to combat HSV. […] Stress is a common trigger for many people with HSV, so get regular exercise and practice other relaxation techniques to help manage your stress levels.

• #21 Cold sore triggers, symptoms & treatment | HealthPartners Blog

  https://www.healthpartners.com/blog/cold-sore-treatments/

  Some studies suggest that the amino acid arginine found in chocolate, wheat, nuts and seeds (especially pumpkin seeds), squash and oats causes cold sores. […] People with periods may find that their cold sore outbreaks follow their menstrual cycle. […] Trauma to your lips and the skin around your mouth cuts and bruises, even razor burn can cause an HSV flare-up and subsequent cold sore. […] The virus that causes cold sores is very contagious, especially during an outbreak. […] Any activity that brings an active cold sore into direct contact with someone elses mucosal skin (the skin of the genitals, the lips, and the inside of the mouth and nose) can transmit the herpes simplex virus. […] Cold sores are contagious from when they first appear until they go away, but they can be especially contagious during certain stages of an outbreak. […] Cold sore outbreaks often decrease in severity and frequency over time.

• #22 What Causes a Cold Sore? What Triggers Cold Sores?

  https://www.abreva.com/about-cold-sores/what-triggers-your-cold-sores/

  When we ask what causes cold sores in the mouth and on the lips?, we really should be asking 'what triggers cold sores?’. The herpes simplex virus (HSV-1) is the initial cause of the infection without it there are no cold sores or blisters but the blisters themselves are often triggered by psychological and environmental factors, such as stress or a cold i. […] The main causes of cold sores on lips are ii: stress, fatigue, exposure to sun and wind, hormonal changes, weakened immune system. […] Research has shown that feeling under pressure or being stressed can affect you physically. If you’re wondering if stress causes cold sores, the answer appears to be yes. When we’re under mental stress, our immune systems suffer. This gives your dormant cold sore virus a chance to replicate itself and cause havoc in the form of blisters.

• #22 What Causes a Cold Sore? What Triggers Cold Sores?

  https://www.abreva.com/about-cold-sores/what-triggers-your-cold-sores/

  Fatigue is another possible answer when it comes to the question, what causes a cold sore outbreak? Feeling tired and run down can make you vulnerable to cold sores. Lower energy stores tax your immune system, making it harder for your body to deal with viruses, including the cold sore virus. […] Cold weather can trigger cold sores. Changes in temperature and air moisture can play havoc with your body’s ability to keep the virus from producing blisters. […] Sun exposure, along with the common cold and fatigue, is one of the top three causes of cold sores. […] The rise and fall of hormones during a natural menstrual cycle can be a cause of cold sores, too. Cold sores are often experienced just before or during your period as a result of the hormonal changes. […] Visiting a dentist may trigger an outbreak of cold sores. Pressure on the lips or mouth area during dental treatment can result in a cold sore blister, as can the stress and anxiety some people experience during dentist visits. […] The cold sore virus lives inactive in your mouth area in nerve cells. But while your immune system usually ensures that the virus doesn’t replicate and cause blisters, if it’s busy fighting off another virus or infection, such as a cold or the flu, you may experience a cold sore outbreak.

• #23 6 Top Causes and Triggers of Cold Sores

  https://www.pomdental.com/6-top-causes-and-triggers-of-cold-sores/

  Cold sores can be extremely painful, and since they develop around your mouth and lips, they make speaking and eating very difficult. […] But first, you must learn what causes and triggers cold sores so you can fight against them. […] There is no one reason behind cold sores. However, the several causes of cold sores are discussed below: […] Herpes Simplex Virus is the reason behind cold sores. It is spread through close contacts, such as kissing, eating from the same utensils, sharing towels, etc. […] A weak immune system can also cause cold sores as the Herpes simplex virus finds it easier to attack your body. […] Exposure to the sun and cold winds can also cause the appearance of cold sores. […] If you have the Herpes Simplex virus, cold sores can appear even due to excessive stress. […] Lack of Vitamin C and D can also cause cold sores to form. […] Cold sores take time to heal. They not only affect your quality of life but can also take a toll on your confidence with their frequent outbreaks.

• #24 What is a Cold Sore Caused By? – hub.health

  https://hub.health/blog/everyday-health/what-is-a-cold-sore-caused-by/?srsltid=AfmBOoqHqRUudhOi6oXU6p885ySM09bhhmwX3vb1i3HX1oUI7nyPT3TU

  Several common triggers have been identified: Weakened Immune Systems: When the immune system weakens due to illness, stress, or fatigue, the virus can exploit this vulnerability and begin its replication process. Ultraviolet (UV) Radiation: Prolonged exposure to sunlight or other sources of UV radiation can prompt the reactivation of the virus, leading to cold sore outbreaks, particularly in the lip area. Hormonal Fluctuations: Hormonal changes, such as those occurring during menstruation, can influence the immune system and provide an opportunity for the virus to resurface. Injuries or Trauma: Physical injury to the mouth area, such as a cut or a burn, can disrupt the nerve cells and trigger the virus’s reactivation. Fever and Illness: The body’s response to a fever or other infections can weaken the immune system and allow the virus to emerge from its dormant state.

• #24 What is a Cold Sore Caused By? – hub.health

  https://hub.health/blog/everyday-health/what-is-a-cold-sore-caused-by/?srsltid=AfmBOoqHqRUudhOi6oXU6p885ySM09bhhmwX3vb1i3HX1oUI7nyPT3TU

  It is important to note that not everyone who carries the herpes simplex virus will experience cold sore outbreaks. Some individuals may remain asymptomatic carriers, never displaying any visible signs of infection. However, those who do experience cold sores often find that these triggering factors influence their frequency and severity.

• #25

  https://www.orajel.com/en/resource-center/cold-sore-pain-relief/cold-sore-triggers

  Direct injury to the mouth as well as dental procedures can trigger a cold sore. – Tell your dentist if you have experienced cold sores before any dental work – Wear a mouth guard to minimize potential harm to the face during contact sports. […] Hormonal changes during menstruation and pregnancy can trigger cold sores.

• #26 Herpes simplex – Causes, Symptoms, Infections and Treatments | MedPark Hospital

  https://www.medparkhospital.com/en-US/disease-and-treatment/herpes-simplex

  Herpes simplex can recur as soon as 7 days after the first episode if activation of the hidden HSV virus in the ganglion region occurs. […] Factors that can cause a recurrence of herpes simplex include: Low bodily immunity, Inadequate rest, Other viral infections or develop a high fever, Taking immunosuppressive drugs such as steroids, Hormonal fluctuation during menstruation, Surgery that affects nerves, Hot weather, exposure to sunlight, Malnutrition, Stress.

• #27 Cold Sores

  https://www.healthhub.sg/a-z/diseases-and-conditions/cold-sores

  Cold sores are mostly caused by an infection with the Herpes Simplex Virus (HSV). […] Once infected with the HSV, the virus remains in the body for life. […] Cold sores may not appear again if the HSV remains inactive. However, the HSV may become active and cause cold sores via the following triggers: Exposure to strong sunlight, cold or wind, Stress or fatigue, Weakened immune system, Fever or infection, Hormonal changes (e.g. menses).

• #28 Why do I keep getting cold sores? Causes and prevention

  https://www.medicalnewstoday.com/articles/324707

  Cold sores can occur when a person contracts the herpes simplex virus. Some people get cold sores repeatedly throughout their lifetime, as the virus lies dormant in the body between outbreaks. […] Once a person contracts the herpes simplex virus (HSV-1), it usually causes an initial outbreak of cold sores. Then, the virus remains in the persons body for the rest of their life, causing new cold sores to form randomly when it reactivates. […] If a person keeps getting cold sores, there may be an underlying cause. Many factors can trigger reactivation and subsequent cold sore outbreaks, including: hormonal changes, such as those associated with pregnancy or menopause, another viral infection or illness, exposure to sunlight, wind, or cold, stress, fatigue, immune system changes. […] The virus that causes cold sores is extremely contagious, even when a person does not have cold sores.

• #28 Why do I keep getting cold sores? Causes and prevention

  https://www.medicalnewstoday.com/articles/324707

  Anyone who has HSV-1 or HSV-2 is at risk of developing cold sores. […] Not everyone who has the virus will have recurrent cold sores. People at most risk of developing recurrent cold sores or other complications from the virus may have a weakened immune system. […] Having conditions such as eczema or psoriasis may also increase a persons risk of developing frequent cold sores. […] Cold sores can be irritating and painful. Once a person has HSV-1, it can lie dormant between outbreaks, which can recur throughout a persons life. […] If a person keeps getting cold sores, they may wish to speak to a doctor about taking antiviral medications to lessen their recurrence.

• #29 What Causes Cold Sores? – The Waiting Room

  https://thewaitingroom.karger.com/embarrassing-problems/what-causes-cold-sores/

  Cold sores are caused by a virus called herpes simplex 1 (HSV1) and herpes simplex 2 (HSV2). (Herpes simplex viruses also cause genital herpes.) Two-thirds of the adult population worldwide have been infected with HSV1. HSV1 often spreads through contact with skin or saliva from the infected person. Most people who have HSV1 got it during childhood from contact such as receiving a kiss from a relative, i.e. normally from oral to oral contact. […] After someone has contracted the virus, it remains inactive (dormant) most of the time in parts of our nerves called the ganglia. […] From time to time, the virus may be reactivated by certain triggers, resulting in another outbreak of cold sores. These triggers might include being run down, fatigue, hormonal changes, or sunlight. […] No one really understands why the virus in the ganglion suddenly wakes up from time to time and decides to go to the skin and cause a cold sore. But, in some people, there are some definite triggers that make this happen, such as: bright sunshine, wind, other damage to the skin (such as facial resurfacing procedures), emotional stress, physical stress, such as having another illness, major dentistry, such as having a tooth removed, menstruation.

• #30 Cold sores – questions and answers – Herpes Viruses Association

  https://herpes.org.uk/cold-sores/

  The virus stays in a nerve junction near the spinal cord and may sometimes reappear, from time to time. […] Triggers vary from person to person: try to find out what causes your outbreaks so that you can try to prevent them. Common reasons for recurrences are illness, stress, tiredness, being run down, having a period, too much alcohol or ultraviolet (UV) light from the sun or sunbeds.

• #31

  https://www.checkable.com/blogs/blog/what-causes-cold-sores

  If you have a history of cold sores, several things can activate the herpes virus and cause cold sores to appear. […] Yes, cold sores are contagious. As mentioned above, you can get them through contact with another person that has the virus. […] Cold sores do not often cause complications; however, in some cases, they can lead to severe conditions: Cold sores, or HSV-1, can be spread through oral sex. This transmission can cause an HSV-1 genital herpes infection. […] Some cases of HSV-1 and HSV-2 can lead to severe complications.

• #32 Herpes simplex gingivostomatitis

  https://www.rch.org.au/kidsinfo/fact_sheets/Herpes_simplex_gingivostomatitis/

  Herpes simplex gingivostomatitis is inflammation of the gums and lips caused by the herpes virus the same virus that later causes cold sores. […] Once someone has been infected with the herpes simplex virus, the virus will stay in their body for life. Your child may have other episodes of herpes reactivation (when the virus affects the body again), but the first instance is usually the worst, and they may not experience symptoms such as painful blisters again. Future episodes of herpes is often referred to as cold sores.

• #33 Cold Sore Fact Check: Do Cold Sores Mean You Have An STD?

  https://www.abreva.com/managing-lip-health/cold-sore-triggers/do-cold-sores-mean-you-have-std/

  Cold sores are caused by the HSV-1 virus, which is a strain of the herpes simplex virus. […] The way that HSV-1 is spread is by engaging in intimate contact like kissing or oral sex with someone who is infected with HSV-1. […] After you become infected with HSV-1 for the first time, you carry the virus with you for the rest of your life. […] The first time you’re infected with HSV-1 tends to be accompanied the most extreme symptoms, including swollen lymph nodes, headache and other flu-like symptoms. […] The way that HSV-2 is transmitted from person to person is via contact with the anal or genital surfaces, skin, fluid or sores of a person that’s carrying the virus. […] It’s possible for HSV-2 to be transmitted even if there are no visible symptoms. […] Like oral herpes, the first genital herpes outbreak tends to have the most severe symptoms and may be accompanied by swollen lymph nodes, headache, fever, body aches and more viral shedding.

• #34 Stop Recurring Cold Sores | Compeed®

  https://www.compeed.co.uk/why-do-i-keep-getting-cold-sores/

  Cold sores are caused by a virus named herpes simplex virus 1 (HSV-1). […] Unfortunately, after the first infection, the virus lays dormant inside the nerve cells of the face for the rest of your life. […] Reactivation or recurrence, when triggering factors such as emotional stress, fever or exposure to sunlight can make the virus reawaken and lead to a relapse. […] The virus reactivates around the same spot every time. […] The severity of outbreaks generally lessens over time with a reactivation of the virus tending to decrease in people over the age of 35 years. […] The rate and severity of the sores usually diminish as you get older.

• #35 Herpes Simplex Virus (Cold Sores) in Children | Cedars-Sinai

  https://www.cedars-sinai.org/health-library/diseases-and-conditions—pediatrics/h/herpes-simplex-virus-cold-sores-in-children.html

  Cold sores are small blisters around the mouth caused by the herpes simplex virus. They are sometimes called fever blisters. […] The most common cause of cold sores is the virus called herpes simplex virus 1. The herpes simplex virus in a cold sore is contagious. It can be spread to others by kissing, sharing cups or utensils, sharing washcloths or towels, or by touching the cold sore before it’s healed. The virus can also be spread to others 24 to 48 hours before the cold sore appears. […] Hot sun, cold wind, illness, stress, menstrual periods, or a weak immune system can cause cold sores to occur. […] The herpes simplex virus infection that causes cold sores is a life-long infection. Therefore it can’t be completely eliminated from the body by treatment, but the treatment may help ease some cold sore symptoms and help these to resolve sooner. […] In rare cases, the herpes simplex virus can cause inflammation of the brain (encephalitis). This is a serious illness and needs to be treated right away.

• #36 Herpes Simplex Virus (HSV) Infections – Infections – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/infections/herpesvirus-infections/herpes-simplex-virus-hsv-infections

  Transmission usually occurs at birth, when the baby comes into contact with infected secretions in the birth canal. […] When acquired at birth, the infection appears between the first and fourth week of life. […] Newborns with HSV infection become very ill. […] Without treatment, about 85% of those with widespread disease and about half of those with a brain infection die. […] Even with treatment, many have brain damage.

• #36 Herpes Simplex Virus (HSV) Infections – Infections – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/infections/herpesvirus-infections/herpes-simplex-virus-hsv-infections

  The lip sore is called a cold sore or fever blister (so named because they are often triggered by colds or fevers). […] Other triggers include over-exposure to sun on the lips, anxiety, certain dental procedures, and any condition that reduces the body’s resistance to infection. […] The blisters develop 4 to 7 days after people are infected. […] The blisters go away but may come back (recur) because the virus never truly leaves the body. […] In people with a weakened immune system, recurrences of oral or genital herpes can result in progressive, gradually enlarging sores that take weeks to heal. […] HSV can infect the brain. This infection (called herpes encephalitis) begins with confusion, fever, and seizures and can be fatal. […] Infrequently, a pregnant woman can transmit HSV infection to her baby (called neonatal herpes).

• #37 Alzheimer’s Could Be Linked to a Common Virus You Already Have : ScienceAlert

  https://www.sciencealert.com/alzheimers-could-be-linked-to-a-common-virus-you-already-have

  The common cold sore virus, which is often caught in childhood, usually stays in the body for life quietly dormant in the nerves. […] This same virus called herpes simplex virus type 1 may also play an important role in something far more serious: Alzheimer’s disease. […] We found that this cold sore virus can be present in the brains of older people. […] People who have a certain version of a gene (called APOE-e4) that increases their risk of Alzheimer’s, and who have been infected with this virus, have a risk that is many times greater. […] We believe that the virus stays mainly dormant in the body for years possibly decades. But later in life, as the immune system gets weaker, it can enter the brain and reactivate there. […] Over time, repeated flare-ups could gradually cause the kind of damage that leads to Alzheimer’s in some people.

• #38 What causes cold sores? – Genes, Stress and Nutrition

  https://www.gbhealthwatch.com/Trait-Cold-Sores.php

  Cold sores are caused by the infection of a specific type of virus called HSV-1 (herpes simplex virus 1). This virus is present in 80% of the general population. It normally resides in your nervous system and remains dormant there. When your immune system is down due to other health conditions, such as when you are stressed, the virus becomes activated. It is then transported to the skin of the lips by the neuronal axons. In the skin cells, HSV-1 begins the replication process, which includes shedding, destroying and breaking the skin cells. The ultimate result is cold sore symptoms. […] APOE was the first reported gene associated with cold sores. As mentioned in this article, the APOE4 variant is associated with higher risk for high blood cholesterol and Alzheimer Disease. In a study in 69 people diagnosed with cold sores and 77 controls who claimed that they have never had a cold sore, the frequency of the APOE4 allele was much higher (29.7%) in the cold sore group than in the control (8.4%). It was suggested that peptides derived from the normal APOE protein had anti-HSV-1 activity while this activity was reduced in the APOE4 variant.

• #38 What causes cold sores? – Genes, Stress and Nutrition

  https://www.gbhealthwatch.com/Trait-Cold-Sores.php

  Subsequently, the C21orf91 gene was also associated with cold sores. A study found that people carrying the ancestral variant (C-allele of SNP rs1062202) of this gene are more likely to be frequently affected, having cold sore episodes twice or more annually than people carrying the other variant (T-allele).

• #39 About Genital Herpes | Genital Herpes | CDC

  https://www.cdc.gov/herpes/about/index.html

  Genital herpes is an STI caused by two types of viruses herpes simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (HSV-2). […] Oral herpes caused by HSV-1 can spread from the mouth to the genitals through oral sex. This is why some cases of genital herpes are due to HSV-1. […] Genital herpes can cause painful genital sores and can be severe in people with suppressed immune systems.

• #40 What Herpes Looks Like: Pictures, Prevention, Treatment

  https://www.verywellhealth.com/herpes-simplex-pictures-4020363

  Cold sores (also called fever blisters, oral herpes, or orolabial herpes) are more often caused by HSV-1 than HSV-2. Cold sores progress in much the same way as genital herpes. HSV-1 can also affect the tongue, gums, or face. […] HSV-2 is often thought of as genital herpes but HSV-1 can also be passed to the genitals or anus via oral sex. HSV-1 that causes a genital herpes outbreak is less virulent and less likely to recur. […] HSV-1 and HSV-2 can both be spread to other parts of the body by hand-to-skin contact, such as rubbing a sore and touching your face, eye, or anus. This can occur between someone with herpes and someone without, or the same person can spread infection in their own body. […] The mode of transmission of HSV-1 and HSV-2 (meaning the ways that the viruses are passed) differ slightly: HSV-1 is mainly passed by coming into contact with the virus in the sore, saliva, or surfaces in or around the mouth. It can also be passed from the mouth to the genital via oral sex. HSV-2 is mainly passed during sex through contact with herpes sores on the genital or anus. It can even be passed through intact skin from a person with an active but asymptomatic (symptom-free) infection. […] It can be difficult to avoid HSV as nearly half of all people ages 11 to 49 have HSV-1 and roughly one in nine have HSV-2. Once you have HSV, you typically have it forever and can infect others during episodic outbreaks.

• #41 Understanding Cold Sores: Causes, Symptoms, and Treatments

  https://www.westlakedermatology.com/blog/cold-sores-symptoms-causes-and-treatments/

  Cold sores are caused by the herpes simplex virus (HSV), with most cases being attributed to HSV type 1 (HSV-1). HSV-1 is highly contagious and can be transmitted through direct contact with an infected person or by sharing utensils, towels, or other personal items. […] Certain factors can trigger cold sore outbreaks, including stress, fatigue, hormonal changes, exposure to sunlight, and a weakened immune system. Additionally, some individuals may be more susceptible to cold sores due to genetic factors or underlying health conditions. […] It’s estimated that 50 to 80% of Americans are infected with herpes virus which may lead to cold sores development. However, actual occurrence of cold sores differs greatly from person to person. Some individuals infected with the herpes virus will never develop a cold sore as the virus remains dormant. For others, cold sores can as frequently as 2-3 times per year after the virus is triggered by stress, fatigue, or injury.

• #42 Cold Sore Causes and Diagnoses | Northwestern Medicine

  https://www.nm.org/conditions-and-care-areas/dermatology/cold-sores/causes-and-diagnoses

  Infection with the herpes simplex-1 virus causes cold sore outbreaks. You can catch HSV-1 from someone else who has the virus active or not by kissing and sharing beverages, eating utensils, napkins and towels. It can also be spread by sexual contact with someone who has genital herpes. […] More than 80 percent of Americans have the herpes simplex type 1 virus in their system. Once you have the virus, it stays in your body for the rest of your life.

• #43 Cold Sore Causes | LloydsPharmacy Online Doctor UK

  https://onlinedoctor.lloydspharmacy.com/uk/sexual-health-advice/causes-cold-sores

  Cold sores are common and typically clear up on their own, but lets look into what causes them and how we can help ease the discomfort they can cause. […] Herpes simplex is a type of herpes virus that can cause many conditions. Two of the most common ones are cold sores and genital herpes. […] The herpes simplex virus is highly contagious and spreads through skin-to-skin contact. There are two types, HSV-1 and HSV-2; both can cause cold sores and genital herpes. HSV-1 more commonly causes cold sores. […] You can contract the herpes simplex virus in several different ways. […] The following activities can cause cold sores: Kissing someone with a cold sore, Sharing lip products, utensils or cups with someone who has a cold sore, Giving oral sex to someone who has genital herpes. […] If you do contract the herpes virus and develop a cold sore, its important to understand a few things. Firstly, its common to experience recurring outbreaks of symptoms, even after your initial cold sore has cleared up. This is because the herpes virus passes through the skin and travels up into the nerves, where it lies dormant for long periods. In reaction to certain triggers, the virus causes a recurrence of symptoms. […] Triggers for cold sores include: Having another infection, Having a fever, Feeling very stressed or upset, Being very tired, Menstruation, Receiving an injury to the affected area, Strong sunlight.

• #44 Cold sores. Information on the causes, symptoms and treatment of cold sores.

  https://www.avogel.co.uk/health/immune-system/cold-sores/

  Cold sores are caused by the cold sore virus otherwise known as the Herpes Simplex Virus 1 or HSV-1. […] Cold sores are a recurring problem and this is because the cold sore virus is difficult, if not impossible, to eradicate from the body. […] Typically, the virus enters the body when a person is younger and commonly during childhood. […] However, certain situations encountered by the body can cause the virus to wake up. These are known as trigger factors and lead to a reactivation of the virus in the body. […] For instance, a cold sore can develop if your immune system is weakened because of stress, lack of sleep, or because it has to fight off viruses causing a cold or flu. […] If your immune system has a tendency to be weak, or if you encounter cold sore triggers often, you may become prone to recurring cold sore outbreaks.

• #45 Cold Sores Causes Clear Skin Clinic

  https://www.clearskin.london/skin-conditions/cold-sores/causes/

  Many people get cold sores because it is highly contagious. People are prone to this when they are little as kids or when kissed by an infected person. […] The herpes simplex virus (HSV) is responsible for cold sores; once you have this virus, it remains in your system for life. After the sores have healed, the virus travels to your nerves and stay there until it is reactivated. […] Outbreaks are less frequent after 35 years of age, factors that are likely to reactivate the virus are: […] Triggers vary from person to person.

• #46 Cold sores

  https://www2.hse.ie/conditions/cold-sores/

  Cold sores are tiny, fluid-filled blisters on the face (or for adults also on the genitals) that are caused by the herpes simplex virus. […] Most people are exposed to the cold sores virus when they are young after close contact with someone who has a cold sore. […] The cold sore virus is spread by direct skin-to-skin contact and is highly infectious. […] Cold sores can be fatal to newborn babies and dangerous for older babies or children. […] Do not kiss babies if you have a cold sore. It can lead to neonatal herpes. […] In rare situations, cold sores can cause complications for older babies and children. The most serious of these is encephalitis, when the virus causes an inflammation of the brain. […] Use antiviral creams as soon as you feel a cold sore coming on. They do not always work after blisters appear.

• #47 What causes cold sores and how to get rid of them

  https://sfsunsetdentistry.com/blog/what-causes-cold-sores-and-how-to-get-rid-of-them/

  What causes cold sores (Herpetic Lesions)? Cold sores, sometimes called fever blisters, are groups of small blisters on the lip and around the mouth that are caused by the herpes simplex virus. This virus usually enters the body through a break in the skin around or inside the mouth. They can be spread when a person touches a cold sore or contacts the infected fluid from sharing eating utensils or razors, or through kissing or touching that person’s saliva. […] The herpes simplex virus that causes cold sores cannot be cured. After you get infected, the virus stays in your body for the rest of your life. If you get cold sores often, treatment can reduce the number of cold sores you get and how severe they are. It often happens that people will get cold sores that reoccur in the same spot every time. After being treated with a laser multiple times, there is a good chance that sore won’t appear again in that spot.

• #48

  https://myhealth.alberta.ca/Health/pages/conditions.aspx?hwid=hw31977

  Cold sores are caused by the herpes simplex virus (HSV). […] HSV usually enters the body through a break in the skin around or inside the mouth. […] There is no cure for cold sores or the virus that causes them.

• #49 Content – Health Encyclopedia – University of Rochester Medical Center

  https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=90&contentid=P02518

  Cold sores are small blisters around the mouth caused by the herpes simplex virus. […] The most common cause of cold sores is the virus called herpes simplex virus 1. […] The herpes simplex virus in a cold sore is contagious. It can be spread to others by kissing, sharing cups or utensils, sharing washcloths or towels, or by touching the cold sore before it’s healed. […] The virus can also be spread to others 24 to 48 hours before the cold sore appears. […] Once a child is infected with the herpes simplex virus, the virus becomes inactive (dormant) for long periods of time. It can then become active at any time and cause cold sores again. […] Hot sun, cold wind, illness, stress, menstrual periods, or a weak immune system can cause cold sores to occur. […] The herpes simplex virus infection that causes cold sores is a life-long infection. Therefore it can’t be completely eliminated from the body by treatment, but the treatment may help ease some cold sore symptoms and help these to resolve sooner. […] In rare cases, the herpes simplex virus can cause inflammation of the brain (encephalitis). This is a serious illness and needs to be treated right away. […] Cold sores in a newborn baby can cause serious illness and death.

• #50 Cold sore causes and triggers | Advice | Mederma®

  https://www.mederma.com/article/cold-sore-causes-and-triggers/

  Cold sores are a common condition caused by a virus, commonly the herpes simplex virus type 1 (HSV-1), and sometimes less commonly, the herpes simplex virus type 2 (HSV-2). […] Cold sores are caused by the HSV-1 virus. […] The cause of a cold sore and what triggers an outbreak are different. […] You can catch the virus that causes a cold sore, sometimes called a fever sore, by being in contact with someone who has the HSV-1 virus. […] Contact is one the main causes of a first cold sore whether its through bodily contact, such as kissing or an exchange in bodily fluids, such as sharing glasses and straws. […] The virus that causes a cold sore is contagious even before a blister develops. […] When the HSV-1 virus has been contracted, the virus stays in the body for the rest of your life. […] Cold sores are caused by the HSV-1 virus, usually contracted after coming into contact with someone who has an active cold sore.

• #51 Cold Sore Causes, Triggers, and Treatment | InterceptCS

  https://coldsores.com/cold-sore-causes/

  Primary Cause: HSV-1 Infection […] Transmission: HSV-1 is typically spread through direct contact with infected skin or saliva (e.g., kissing, sharing utensils, razors, or lip balm). […] Latency: After the initial infection (which may or may not cause noticeable symptoms), the virus becomes dormant in nerve cells, usually around the face. […] Reactivation: At times, the virus reactivates, traveling back down the nerve to the skin, where it causes a cold sore. […] Essentially, cold sores are a strain of the herpes simplex virus, HSV-1. […] The herpes simplex virus usually enters the body through a break or opening in the skin around or inside the mouth. […] Cold sore outbreaks vary significantly from person to person. […] Specific Triggers of Cold Sores Can Include: Cold and Warm Weather, Fatigue, Other illnesses, such as cold or fever, Hormones, Mental or Physical Stress, Irritation of the Lips. […] Some items are perfect carriers for the cold sore virus. […] If you find that you’ve got a new cold sore for the first time, or are constantly dealing with outbreaks, then it’s time to take action.

Zobacz więcej