Materiały źródłowe

• #1 Hives: Causes, Symptoms, Diagnosis, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/8630-hives

  Hives are a type of allergic reaction that creates itchy bumps on your skin. […] Hives are raised red bumps (welts) or splotches on the skin. […] The medical name for hives is urticaria. […] Acute urticaria refers to hives that don’t last very long (less than six weeks). Chronic urticaria refers to hives that happen at least twice a week for more than six weeks. […] Chronic hives do last for long periods of time but usually aren’t permanent. […] Your healthcare provider can diagnose hives and angioedema by looking at your skin. […] Allergy tests can help identify what’s triggering a reaction, but this is true primarily for acute hives. […] Skin tests: During this test, healthcare providers test different allergens on your skin. […] A blood test checks for specific antibodies in your blood.

• #1 Testing for Hives (Urticaria): Getting a Diagnosis

  https://www.health.com/hives-diagnosis-7092859

  Hives, also known as urticaria, is an inflammatory skin condition characterized by red or skin-colored welts on the body. Proper diagnosis of hives is essential for the medical management of this condition, which may be treated by a primary care physician, dermatologist, allergist, or another healthcare provider. This typically involves a physical examination and an assessment of medical history. Additional tests may be needed for confirmation and to determine the severity and type of urticaria. […] The first step of diagnosis typically involves a thorough and comprehensive evaluation of your medical history and status. The healthcare provider will ask about the size, shape, and location of the bumps (called weals) as well as any larger areas of swelling. […] Following a discussion of your symptoms, your healthcare provider will perform a physical exam for your condition. They will look for any symptoms on your eyes, ears, nose, throat, lymph nodes, abdomen, and musculoskeletal system. This is critical for ensuring that symptoms are indeed those of hives and not of other conditions.

• #1 How are Chronic Hives Diagnosed?Share to Facebookprint pageBookmark for latercaret iconFollow us on facebookFollow us on instagramFollow us on facebookFollow us on linkedincaret icon

  https://chronic-hives.com/diagnosis

  Diagnosing chronic hives is not always easy. This is because many other conditions cause hives. Also, the cause of chronic hives is usually unknown. Your doctor needs to rule out any other causes of your symptoms to help you manage and treat your hives. […] Many people with chronic hives experience a delay in diagnosis. During this time, doctors will use your health history and lab tests to determine a diagnosis. They may also refer you to specialists to help rule out other conditions. Usually, doctors use 3 things to diagnose chronic hives: Your health history, A physical exam, Identifying triggers that worsen or cause symptoms. […] A detailed history of your symptoms is the most important part of diagnosis. It may be helpful to use a diary to keep track of your symptoms, activities, and any triggers. Your doctor will ask about: Shape, size, and site of hives, Frequency, timing, and duration of hives, Whether you also have swelling under skin (angioedema), Family history of hives and swelling.

• #1 Hives (Urticaria)

  https://www.adena.org/types-of-care/conditions/hives

  Hives (urticaria) are red, itchy, raised bumps on the skin. They often last less than 12 hours in one area of the skin. […] Hives may last for a short or long time. If hives last for a short time, the cause could be an allergic reaction from eating certain foods or taking certain medicines. […] When hives come and go long-term (lasting weeks), the cause often isnt known. […] Hives are a common allergic reaction to these foods: Nuts, Peanuts, Eggs, Fish, Shellfish, Milk, Wheat, Soy. […] You may also get hives from these medicines: NSAIDs (nonsteroidal anti-inflammatory drugs), such as ibuprofen or naproxen, Antibiotics, especially penicillin and related antibiotics in the same class, Medicines for seizures and epilepsy, Chemotherapy medicines, Medicines for treating cancer, such as monoclonal antibodies.

• #1 Hives (Urticaria) | Causes, Symptoms & Treatment

  https://acaai.org/allergies/allergic-conditions/skin-allergy/hives/

  A single episode of hives does not usually call for extensive testing. If a food allergy is suspected, consider keeping track of what you eat. […] If the cause cannot be identified, even after a detailed history and testing, the condition is called chronic idiopathic urticaria. […] The only treatment for anaphylaxis is epinephrine.

• #1 Diagnosis of urticaria

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3667285/

  Acute urticaria do not need extensive diagnostic procedures. Urticaria activity score is a useful tool for evaluation of urticaria. Complete blood count, Erythrocyte sedimentation rate and C reactive protein are important investigations for diagnosis of infections in urticaria. Autologous serum skin test is a simple office procedure for diagnosis of auto reactive urticaria. Closed ball point pen tip is a simple test to diagnose dermographism. […] Diagnostic procedures in CsU are performed to characterize possible underlying causes, as eliminating them will cure patients. […] A search for possible underlying causes and/or relevant triggers should be conducted especially, in patients who present with relapsing symptoms for more than 1 year and/or with high disease activity. CsU disease activity can be evaluated using the urticaria activity score (UAS), which is a clinical symptom score that combines daily recordings of the numbers of wheals and the intensity of pruritus.

• #1 Hives and angioedema – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/hives-and-angioedema/diagnosis-treatment/drc-20354914

  To diagnose hives or angioedema, your doctor will likely look at your welts or areas of swelling and ask about your medical history. You may also need blood tests or an allergy skin test. […] For hives and angioedema, questions you may want to ask include: Do I need any tests to confirm the diagnosis? […] Your doctor is likely to ask you a number of questions, such as: Have you ever had a similar skin reaction before?

• #1 Chronic Urticaria Workup: Laboratory Studies, Other Tests, Histologic Findings

  https://emedicine.medscape.com/article/1050052-workup

  The information elicited from the history and physical examination is used to direct the selection of laboratory tests. While in most cases no diagnostic testing may be necessary, targeted laboratory testing based on clinical suspicion is appropriate. In most patients, the only screening tests that are recommended to be performed are a complete blood cell (CBC) count with differential, erythrocyte sedimentation rate (ESR) and/or C-reactive protein (CRP), liver enzymes, and thyrotropin (TSH). […] The Chronic Urticaria (CU) Index is not widely available and is only performed at a few reference laboratories. Patients with a chronic form of urticaria who have a positive functional test result for autoantibody to the Fc receptor of IgEthat is, anti-FcRlikely have an autoimmune basis for their disease. A positive result does not indicate which autoantibody (anti-IgE, anti-FcRI, or anti-FcRII) is present. This test is usually combined with thyroid function testing, antithyroid microsomal titers, and peroxidase antibody titers.

• #1 Hives (Urticaria) Diagnosis and Tests – WelcomeCure

  https://www.welcomecure.com/diseases/hives-urticaria/tests-and-diagnosis

  Hives (Urticaria) diagnosis is usually made clinically and on the basis of history, especially in acute cases, and no investigations are needed. History and clinical examination are crucial in Hives (Urticaria) diagnosis. […] In chronic or episodic cases, the following investigations for Hives (Urticaria) diagnosis may be done based on the history and clinical presentation: Complete blood count to identify problems with the immune system. […] ESR (Erythrocyte Sedimentation Rate) or CRP (C-Reactive Protein). […] Patch testing/prick testing: This test reveals if the skin is allergic to a particular substance by attaching a patch impregnated with the substance to the skin of the back. […] Physical challenge such as cold provocation testing with ice cube, heat provocation test with warm water, pressure testing, UV light testing or exercise for cholinergic urticaria. […] Thyroid hormone levels as well as auto-antibodies to check whether you have an overactive or underactive thyroid gland. […] Dietary challenges using a variety of suspected foods. […] Stool sample to identify intestinal parasites. […] Liver function tests to rule out any liver problems.

• #1 Urticaria (Hives): a complete overview — DermNet

  https://dermnetnz.org/topics/urticaria-an-overview

  Urticaria is characterised by very itchy weals (hives), with or without surrounding erythematous flares. […] Urticaria is diagnosed in people with a history of weals that last less than 24 hours with or without angioedema. […] Skin prick tests and radioallergosorbent tests (RAST) or CAP fluoroimmunoassay may be requested if a drug, latex, or food allergy is suspected in acute urticaria. […] There are no routine diagnostic tests in chronic spontaneous urticaria apart from blood count and C-reactive protein (CBC, CRP), but investigations may be undertaken if an underlying disorder is suspected. […] The autologous serum skin test is sometimes carried out in chronic spontaneous urticaria, but its value is uncertain. […] Inducible urticaria is often confirmed by inducing the reaction eg, scratching the skin in dermographism or applying an ice cube in suspected cold urticaria. […] Biopsy of urticaria can be non-specific. The pathology shows oedema in the dermis and dilated blood vessels, with a variable mixed inflammatory infiltrate.

• #1 Urticaria, Hives Allergy and Treatment – Allergy London

  https://www.allergylondon.com/conditions/urticaria/

  Urticaria is a common cause for referral to allergy clinics. […] Urticaria results from activation of a particular type of the immune cell – known as the ‘mast cell’ – which is resident within the skin in all people. […] In most cases, urticaria is diagnosed by an allergy specialist based on the clinical history as there are usually features that distinguish this disorder from allergic reactions. […] Allergy tests should not be performed in patients who are experiencing spontaneous urticaria because the condition is not caused by allergy. […] Guidelines published by experts in the field therefore specifically advise against performing allergy tests in patients with features of spontaneous (non-allergic’) urticaria.

• #1 How are hives diagnosed?

  https://www.mymed.com/diseases-conditions/hives-urticaria/how-are-hives-diagnosed

  Chronic hives are not commonly linked with an allergic reaction (due to the frequency of recurrences often for more than 6 weeks). […] Tests which may be recommended (where relevant) in the case of chronic hives may include: Blood tests (to check for signs of anaemia), Thyroid function test (to assess any signs of an overactive or underactive thyroid hyperthyroidism or hypothyroidism), Liver function tests, ESR (erythrocyte sedimentation rate) test (to assess any immune system abnormalities), Stool (faeces) sample (to assess for or identify any parasites causing an infection). […] In the case of solar hives (urticaria), tests may be recommended in order to make a diagnosis. […] A doctor will request the patient to perform an exercise routine in order to attempt to stimulate a similar reaction.

• #1 Diagnosis of urticaria

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3667285/

  CsU due to auto-reactivity is diagnosed by use of the Autologous Serum Skin Test (ASST). […] In vitro basophil histamine release assays are useful for confirming CsU due to auto-reactivity and may be performed, together with IgE- and FcRI-antibody assays, to identify those patients with CsU due to auto-reactivity who suffer from autoimmune CsU.

• #1 A Diagnosis of Urticaria, Common Skin Condition | EMJ Reviews

  https://www.emjreviews.com/dermatology/article/urticaria-diagnosis/

  The autologous serum skin test (ASST) and the autologous plasma skin test (APST) indicating CSU are useful to diagnose autoimmune chronic urticaria. […] The negative result of ASST and APST before treatment served as a predictor of good prognosis treatment and urticaria remission during a 2-year observational study. […] Urticaria is a common skin condition and can be diagnosed in the primary care setting. The diagnosis is typically based on noting the patients history and performing a physical examination; however, the cause of urticaria is difficult to determine.

• #1 Chronic Urticaria Workup: Laboratory Studies, Other Tests, Histologic Findings

  https://emedicine.medscape.com/article/1050052-workup

  Although histologic examination is not necessary for the diagnosis of urticaria, a skin biopsy is necessary for the diagnosis of urticarial vasculitis or a neutrophil-predominant pattern of urticaria that may not respond well to antihistamines. A skin biopsy is indicated for patients in whom individual urticarial lesions persist for more than 24 hours or are associated with petechiae or purpura and for patients with systemic symptoms such as fever, arthralgia, or arthritis.

• #1 Patient education: Hives (urticaria) (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/hives-urticaria-beyond-the-basics

  Severe pain, blood blister-like spots, and bruising of the skin are not typical of hives. Having hives along with a fever and joint pains is also not typical. These symptoms suggest a different condition called urticarial vasculitis, which requires a different treatment. […] Angioedema — In up to one-half of people with hives, a condition called angioedema also develops. Angioedema is similar to hives but occurs in the deeper layers of skin. Hives and angioedema can occur at the same time. […] Hives as part of a serious allergic reaction — Hives can also occur as part of a more serious allergic reaction. You should see a doctor or nurse as soon as possible if you develop hives or angioedema suddenly, along with other symptoms such as trouble breathing, tightness in the throat, nausea or vomiting, cramping abdominal pain, or passing out.

• #1 Diagnosing Drug Reactions & Hives | NYU Langone Health

  https://nyulangone.org/conditions/drug-reactions-hives/diagnosis

  Dermatologists at NYU Langone diagnose hives and other types of drug reactions by examining the skin and asking questions about your symptoms. […] Your doctor may recommend a blood test or skin biopsy to help him or her make a diagnosis. […] Some types of drug reactions, such as those associated with eosinophilia and systemic symptoms and Stevens-Johnson syndrome, cause symptoms that appear quickly. […] A skin rash or hives that appear without these symptoms is usually not a sign of serious illness, but a doctor should evaluate any rash that is severe or persists for more than a few days. […] If a drug is causing an adverse reaction, your doctor can often stop that medication and switch you to another one that is just as effective. […] This information helps your doctor determine the cause of the reaction.

• #1 How are Chronic Hives Diagnosed?Share to Facebookprint pageBookmark for latercaret iconFollow us on facebookFollow us on instagramFollow us on facebookFollow us on linkedincaret icon

  https://chronic-hives.com/diagnosis

  Many conditions are easy to confuse with chronic hives. The 2 most similar conditions are urticarial vasculitis (blood vessel inflammation) and mastocytosis (too many mast cells in the body). However, your doctor and specialists can rule out these conditions based on descriptions of your hives. […] Your primary care doctor may be able to diagnose hives themself. But in some cases, they may need to refer you to a specialist. Some situations when you may need to see a specialist include: When they suspect an underlying disorder, If you have signs or symptoms of urticarial vasculitis. […] In these situations, you may have to see a dermatologist or an allergist/immunologist. These are doctors who can perform more detailed tests for skin and allergic conditions.

• #1 Angioedema Workup: Approach Considerations, Laboratory Studies, Allergy Testing

  https://emedicine.medscape.com/article/135208-workup

  The great majority of cases of angioedema can be diagnosed on the basis of the history and physical examination alone; extensive diagnostic workup and laboratory testing are rarely indicated. […] Most mild cases of angioedema do not require any laboratory tests. Screening for suspected allergies to food, stinging insects, latex, and antibiotics can be performed. […] For angioedema without urticaria (especially those with recurrent episodes), diagnostic tests should include the following: C4 level, C1 esterase inhibitor (C1-INH) quantitative and functional measurements, C1q level. […] These studies will help to establish or rule out C1-INH deficiency associated angioedema, either hereditary or acquired. […] C1-INH-HAE types I and II are characterized by low levels of C1-INH or elevated levels of dysfunctional C1-INH, as detected by an immune assay.

• #1 Chronic Urticaria Panel 2 (Comprehensive) | Test Detail | Quest Diagnostics

  https://testdirectory.questdiagnostics.com/test/test-detail/90123/chronic-urticaria-panel-2-comprehensive?p=r&cc=MASTER

  Chronic Urticaria Panel 2 (Comprehensive) – Patients with a chronic form of urticaria who are positive with the functional Histamine Release (Chronic Urticaria) test have an autoimmune basis for their disease. A positive result does not indicate which autoantibody (anti-IgE or anti-Fc epsilon RI alpha chain) is present. A positive anti-IgE antibody does not exclude the presence of anti-Fc epsilon RI alpha chain antibody. Autoimmune thyroid disease coexists in approximately 25% of autoimmune chronic urticaria patients. […] This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

• #1 Hives (Urticaria) | Causes, Symptoms & Treatment

  https://acaai.org/allergies/allergic-conditions/skin-allergy/hives/

  Hives, also known as urticaria, affects about 20 percent of people at some time during their lives. It can be triggered by many substances or situations and usually starts as an itchy patch of skin that turns into swollen red welts. […] If you think you might have hives, then it’s best to speak with an allergist. […] Chronic hives should be evaluated by an allergist, who will ask about your and your family’s medical history, substances to which you are exposed at home and at work, exposure to pets or other animals and any medications you’ve taken recently. […] Your allergist may want to conduct skin tests, blood tests and urine tests to identify the cause of your hives. […] The best way to identify your symptoms is to talk to an allergist who can diagnose and treat both hives and angioedema.

• #1 Hives Diagnosis and Treatment for Arizona — Valley ENT

  https://www.azvent.com/conditions/immunology/hives/

  Hives typically disappear after 24 to 48 hours if they are due to an allergic trigger. […] At Valley ENT, our allergists/immunologists can diagnose and recommend treatments for hives. […] To diagnose whats causing your hives, a specialist examines the welts and asks about your medical history, including any allergies you may already have. […] Allergy testing can identify specific allergens that trigger acute hives. […] Your allergist/immunologist may recommend laboratory tests to determine if an underlying condition is associated with your welts, especially if they are chronic. […] The tests may show signs of infection or autoimmune disorders.

• #1 Evaluation, diagnosis and management of chronic urticaria

  https://www.racgp.org.au/afp/2014/september/evaluation-diagnosis-and-management-of-chronic-urt

  Chronic urticaria is characterised by the occurrence of weals, which occur on a daily basis for more than 6 weeks. Clinical history and physical examination alone are sufficient to establish a diagnosis. […] A detailed history is usually sufficient to establish a diagnosis of urticaria and the type of urticaria. Chronic urticaria persists for more than 6 weeks. […] In 80-90% of cases no identifying trigger for chronic urticaria can be established. However, it is thought that many of these idiopathic urticarias may be attributed to autoimmune causes. Chronic urticaria is associated with autoimmune disorders, most commonly hypothyroidism, but also coeliac disease, systemic lupus erythematosus (SLE) and type 1 diabetes mellitus. […] Diagnosis of chronic urticaria can be established with a history and physical examination.

• #1 Hives: Causes, Symptoms, Diagnosis, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/8630-hives

  Most of the time, hives go away without treatment. […] Your healthcare provider might recommend medications and at-home care to help you feel better and lower your chances of having hives again. […] Treatments include: Allergy medications: Medicines called antihistamines block histamines effects. […] For hard-to-treat chronic hives, your healthcare provider may discuss monthly injections of drugs that block allergic reactions. […] Chronic hives won’t go away in a few weeks. It may take much longer.

• #1 Hives (Urticaria) and Angioedema Overview

  https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/hives-(urticaria)-and-angioedema-overview

  Talk to your doctor if swelling occurs without hives. This may suggest a special situation requiring additional evaluation. […] Antihistamines are the best initial medication to treat your hives. […] About 50% of chronic spontaneous urticaria (hives over 6 weeks with no identifiable cause) will respond to antihistamine as discussed above. […] For those who do not improve on antihistamines, 65% respond to omalizumab. […] Corticosteroids, such as prednisone or prednisolone may help hives. […] Chronic hives can last for many years but will often go away. Hives will resolve in half of patients within 1-2 years and 80-90% of patients will improve within 5 years. […] Even if a patients hives improve, it is not unusual to see the hives recur months to years later.

• #1 Hives (Urticaria) and Angioedema Overview

  https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/hives-(urticaria)-and-angioedema-overview

  Hives or welts, also known as urticaria, are itchy, raised, reddish areas on the skin. […] Doctors will classify your hives based on how long you have had them. This helps doctors think about possible causes of your hives. […] When hives occur for less than 6 weeks, we call this acute urticaria. When hives last longer than 6 weeks, we change the name to chronic urticaria. […] Sometimes the hives in chronic urticaria can occur with angioedema (swelling). […] Neither form of Chronic urticaria is dangerous. […] The most common form of the inducible urticarias is called dermatographic urticaria. […] Antihistamines are frequently an effective form of treatment. […] Usually the cause of chronic spontaneous urticaria is not fully known but is not usually caused by allergies. […] Sometimes chronic hives may be autoimmune in nature, or related to an autoimmune condition including autoimmune thyroid disease, rheumatoid arthritis or systemic lupus erythematousus.

• #1 Hives (Urticaria) Quiz

  https://www.aaaai.org/conditions-treatments/allergies/skin-allergy/hives-(urticaria)-quiz

  Chronic hives (urticaria) are often misunderstood by patients and even medical providers. […] Chronic hives are rarely caused by an allergic reaction, and patients are therefore frequently frustrated by the lack of identifiable cause for their hives. […] Nevertheless, there are safe and effective treatments for chronic hives. […] No testing is usually necessary Since hives are not caused by an allergy and do not suggest the presence of underlying health concerns, testing is rarely needed. Most cases can be confirmed by the appearance and characteristics of the hives. […] Hives are bothersome and frustrating for patients, which is why correct diagnosis and treatment is important. […] Appropriate treatment typically controls symptoms and improves quality of life.

• #2 Chronic Hives (Chronic Idiopathic Urticaria): Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/22900-chronic-hives-chronic-idiopathic-urticaria

  Chronic hives (chronic urticaria) are red, itchy skin welts that last more than six weeks. […] People with certain autoimmune diseases are more prone to chronic hives. […] But often, the cause of chronic hives is unknown. […] Chronic hives are itchy, raised welts that appear on your skin and last for more than six weeks. […] Chronic hives are different than acute hives: […] Chronic hives are visible at least twice per week for more than six weeks. Some chronic hives last for months or years. The cause is often unknown. […] Up to 5% of people develop chronic hives. […] For most people with chronic hives, there’s no known cause. […] About 1 in 5 people who develop chronic hives also have an autoimmune disease. […] Your healthcare provider can diagnose chronic hives by examining your skin and learning more about your symptoms.

• #2 A Diagnosis of Urticaria, Common Skin Condition | EMJ Reviews

  https://www.emjreviews.com/dermatology/article/urticaria-diagnosis/

  Urticaria is a common skin condition that, though rarely fatal, can seriously impair a patients quality of life. […] Diagnosis is typically reached using the patients history along with a physical examination. […] The goal of a diagnostic measure is to identify the type of urticaria and the underlying cause. Urticaria is usually diagnosed by taking the patients history alongside physical examination, with no investigation required to confirm the diagnosis. […] The second step of diagnosis is a physical examination. […] Following a thorough discussion of the patients history and a physical examination, diagnostic provocation tests, including drug, food, and physical tests, are performed as indicated by history and physical examination; moreover, laboratory testing based on related suspicions may also be appropriate.

• #2 Hives (Urticaria)

  https://www.adena.org/types-of-care/conditions/hives

  You can also develop hives from stress, certain infections, animal dander, materials such as latex, and insect stings. […] Hives appear on the skin as red, itchy, raised bumps. They can vary in size and may come and go. […] Your healthcare provider will ask about your health history and do a physical exam. A provider can often diagnose hives by looking at your skin if you have them at your visit. […] Other tests may be needed to figure out what may be causing the hives. […] Allergy testing. These include blood tests and skin tests. They may help figure out what is causing your allergic reaction. […] Biopsy. Your healthcare provider may take a piece of skin and have it looked at under a microscope. This is often not needed unless your healthcare provider is not sure if you have hives or something else.

• #2 Chronic hives – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/chronic-hives/diagnosis-treatment/drc-20352723

  To diagnose chronic hives, your healthcare professional will likely talk with you about your symptoms and look at your skin. One of the telling features of chronic hives is that the welts come and go at random, with each spot usually lasting less than 24 hours. […] You also may need blood tests to determine the cause of your symptoms. An accurate diagnosis will guide your treatment. If needed to clarify the diagnosis, your healthcare professional might do a skin biopsy. A biopsy is a procedure to remove a sample of tissue for testing in a lab. […] For chronic hives, questions you may want to ask include: What kinds of tests do I need? Do these tests require any special preparation?

• #2 Urticaria (Hives): a complete overview — DermNet

  https://dermnetnz.org/topics/urticaria-an-overview

  Urticaria is characterised by very itchy weals (hives), with or without surrounding erythematous flares. […] Urticaria is diagnosed in people with a history of weals that last less than 24 hours with or without angioedema. […] Skin prick tests and radioallergosorbent tests (RAST) or CAP fluoroimmunoassay may be requested if a drug, latex, or food allergy is suspected in acute urticaria. […] There are no routine diagnostic tests in chronic spontaneous urticaria apart from blood count and C-reactive protein (CBC, CRP), but investigations may be undertaken if an underlying disorder is suspected. […] The autologous serum skin test is sometimes carried out in chronic spontaneous urticaria, but its value is uncertain. […] Inducible urticaria is often confirmed by inducing the reaction eg, scratching the skin in dermographism or applying an ice cube in suspected cold urticaria. […] Biopsy of urticaria can be non-specific. The pathology shows oedema in the dermis and dilated blood vessels, with a variable mixed inflammatory infiltrate.

• #2 Patient education: Hives (urticaria) (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/hives-urticaria-beyond-the-basics

  Testing — Skin testing for food and drug sensitivities may be recommended if there are concerns about allergies as a cause of symptoms. This is usually done for people with acute hives. Chronic hives are rarely caused by an allergy. […] Blood tests are sometimes done if hives continue for six weeks or longer. Blood tests can tell if there are signs of underlying diseases, such as thyroid problems or an autoimmune disease. […] Skin biopsy — A skin biopsy (when a small sample of skin is removed) may help identify uncommon causes of hives. A skin biopsy may be recommended for people who have chronic hives along with other symptoms, such as persistent fever, painful hives, individual hives that last for days at a time, or hives associated with bruising of the skin. A skin biopsy may also be recommended for people who have other symptoms or abnormal blood tests.

• #2 Hives: Diagnosis and treatment

  https://www.aad.org/public/diseases/a-z/hives-treatment

  Hives can require emergency care. Go to urgent care or the nearest emergency room if you have any of the following: Swelling on your face, inside your mouth, or in your throat. Problems swallowing or breathing. Feel light-headed or faint. Racing heart. Swelling on your face or inside your mouth or throat can cause problems breathing or swallowing, which can come up quickly. For many people, hives are mild. If you have a mild case, it will likely go away in a few days. To get relief until then, dermatologists recommend that you take an antihistamine (non-drowsy, 24-hour relief) and use these home remedies. […] It can be helpful to see a board-certified dermatologist if hives: Last longer than 6 weeks. Cover a large area of your body. Are caused by an allergy. […] A dermatologist can often diagnose hives by looking at your skin. While your dermatologist may diagnose you during your first office visit, finding the exact cause of hives can take time.

• #2 Hives: Diagnosis and Treatment | Oak Brook Allergists

  https://www.oakbrookallergists.com/2020/11/27/hives-diagnosis-and-treatment/

  Hives, also called urticaria, is a type of skin reaction that produces reddish and very itchy welts. Acute hives are usually a result of an allergic reaction to an insect bite, food, airborne allergen, or medication. […] An allergist can take one look at the spots on your skin and make a diagnosis just based on their appearance. However, part of treating skin allergies is finding out the cause. This helps you know what to avoid in the future. […] Your allergist will first review your medical history and then perform tests to diagnose hives. These tests may include an allergy blood test and a skin-prick test. To identify the cause of hives usually involves a combination of diagnostic testing and detective work. A blood test is used to check for the presence of specific antibodies in your blood; in a skin test, the doctor tests different allergens on your skin and looks for an allergic reaction.

• #2 A Diagnosis of Urticaria, Common Skin Condition | EMJ Reviews

  https://www.emjreviews.com/dermatology/article/urticaria-diagnosis/

  The autologous serum skin test (ASST) and the autologous plasma skin test (APST) indicating CSU are useful to diagnose autoimmune chronic urticaria. […] The negative result of ASST and APST before treatment served as a predictor of good prognosis treatment and urticaria remission during a 2-year observational study. […] Urticaria is a common skin condition and can be diagnosed in the primary care setting. The diagnosis is typically based on noting the patients history and performing a physical examination; however, the cause of urticaria is difficult to determine.

• #2 Hives (Urticaria)

  https://www.adena.org/types-of-care/conditions/hives

  Hives may go away without treatment, especially if they are caused by an allergic reaction. […] If your symptoms last for some time or keep coming back, these treatments may help: Antihistamines. These medicines can ease itching and keep the hives from appearing. […] A possible complication of hives is angioedema. This is swelling in the deeper layers of skin. […] Angioedema is serious. It may need to be treated right away. […] Hives are red, itchy, raised bumps that appear on the skin. They often last less than 24 hours in one area of skin. […] They are often caused by an allergic reaction to certain foods or medicines. […] An allergy test can help figure out what may be causing hives. […] Antihistamines and other medicines can ease symptoms. […] A possible complication of hives is swelling in the deeper layers of skin (angioedema). This is serious and requires medical care right away.

• #2 Histamine Release (Chronic Urticaria) | Test Detail | Quest Diagnostics

  https://testdirectory.questdiagnostics.com/test/test-detail/16838/histamine-release-chronic-urticaria?p=r&cc=MASTER

  Histamine Release (Chronic Urticaria) – Chronic Urticaria (CU) is a common skin disorder affecting 1 to 6% of the general population. It is characterized by repeated occurrence of short-lived cutaneous wheals accompanied by redness and itching. Autoimmune urticaria is defined by the presence of a functional IgG antibody to high-affinity IgE receptor (Fc epsilon RI alpha) or IgE. […] These antibodies trigger mast cell and basophil degranulation by the engagement of Fc epsilon receptor. Functional IgG antibody to the receptor has been identified in approximately 30-40% of patients with CU, and anti IgE antibody has been identified in another 5%-10%. […] This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

• #2 Acute and Chronic Urticaria: Evaluation and Treatment | AAFP

  https://www.aafp.org/pubs/afp/issues/2017/0601/p717.html

  Second-generation H1 antihistamines are first-line medication for the treatment of acute urticaria. […] Most of the data on treatment of urticaria involve chronic cases. Current guidelines suggest a stepwise approach to treating chronic idiopathic urticaria. […] Once symptoms are adequately controlled, physicians should consider stepping down treatment sequentially. […] Acute urticaria is typically self-limited and resolves with proper avoidance of triggers. With chronic urticaria, a prospective cohort study found that 35% of patients are symptom free within one year, with another 29% having some reduction of symptoms.

• #2 Chronic Hives (Chronic Idiopathic Urticaria): Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/22900-chronic-hives-chronic-idiopathic-urticaria

  Treatments for chronic hives include: […] Allergy medications: Daily over-the-counter (OTC) or prescription allergy medications like antihistamines relieve itching and reduce or prevent allergic reactions. […] For half of people with chronic hives, the hives go away (often without treatment) within a year. […] Most of the time, providers can’t pinpoint the cause of chronic hives. However, treatments like antihistamines, steroids and even immunosuppressants can help.

• #3 Patient education: Hives (urticaria) (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/hives-urticaria-beyond-the-basics

  TYPES OF HIVES […] Hives are classified based upon how long you have the hives. Hives can be: […] Acute (brief) […] Chronic (longstanding) […] Inducible (triggered by certain types of physical stimulation, such as heat, cold, or sun exposure) […] When you first get hives, you cannot tell how long they will last, and so you cannot tell if you have acute or chronic hives. […] Although all types of hives look similar, they often have different triggers. Learning what triggers your hives can help you to avoid the trigger. […] Chronic hives — Chronic hives occur daily or almost daily and last longer than six weeks, sometimes for years. Chronic hives can be frustrating because they come and go and can interfere with sleep, work, or school. Hives affect how you look, and people may worry about being near you for fear that you have a contagious infection.

• #3 What is Chronic Urticaria? – Allergy & Asthma Network

  https://allergyasthmanetwork.org/chronic-urticaria/

  Chronic urticaria is a rare condition. More than 500,000 people live with chronic urticaria in the United States. It occurs in 0.23% (or 23 out of every 10,000) of people. However, there are estimates that rates of chronic urticaria may be higher since many times people do not report or recognize symptoms. […] Chronic hives last longer 6 weeks or more. Sometimes they go away for a period of time and then come back. […] Chronic hives occur most days of the week for more than six weeks. People may experience symptoms on their whole body or in one particular area of the body. There are two types of chronic urticaria: chronic spontaneous urticaria and chronic inducible urticaria. […] Doctors often don’t know what causes chronic hives. For as many as 80-90% of people with chronic urticaria, the cause of symptoms is unknown.

• #3 Hives (Urticaria) Diagnosis and Tests – WelcomeCure

  https://www.welcomecure.com/diseases/hives-urticaria/tests-and-diagnosis

  Hives (Urticaria) diagnosis is usually made clinically and on the basis of history, especially in acute cases, and no investigations are needed. History and clinical examination are crucial in Hives (Urticaria) diagnosis. […] In chronic or episodic cases, the following investigations for Hives (Urticaria) diagnosis may be done based on the history and clinical presentation: Complete blood count to identify problems with the immune system. […] ESR (Erythrocyte Sedimentation Rate) or CRP (C-Reactive Protein). […] Patch testing/prick testing: This test reveals if the skin is allergic to a particular substance by attaching a patch impregnated with the substance to the skin of the back. […] Physical challenge such as cold provocation testing with ice cube, heat provocation test with warm water, pressure testing, UV light testing or exercise for cholinergic urticaria. […] Thyroid hormone levels as well as auto-antibodies to check whether you have an overactive or underactive thyroid gland. […] Dietary challenges using a variety of suspected foods. […] Stool sample to identify intestinal parasites. […] Liver function tests to rule out any liver problems.

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