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  • Chronic hives - Symptoms and causes - Mayo Clinic
    Hives — also called urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts Chronic hives are welts that last for more than six weeks and return often over months or years Often, the cause of chronic hives isn't clear The welts often start as itchy patches that turn into swollen welts that vary in size These welts appear and fade at random as the reaction runs its
  • Hives and angioedema - Symptoms and causes - Mayo Clinic
    Hives — also known as urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts that range in size from small spots to large blotches Hives can be triggered by many situations and substances, including certain foods and medications Angioedema can arise with hives or alone It causes swelling in the deeper layers of skin, often around the face and lips Short-lived (acute
  • Cold urticaria - Symptoms causes - Mayo Clinic
    Cold urticaria (ur-tih-KAR-e-uh) is a reaction that appears within minutes after skin is exposed to the cold Itchy welts, also called hives, arise on affected skin Symptoms in people with cold urticaria can range from minor to serious For some people with this condition, swimming in cold water could lead to low blood pressure, fainting or shock Cold urticaria occurs most often in young
  • Dermatographia (Dermatographism) - Symptoms and causes - Mayo Clinic
    Dermatographia is a condition in which lightly scratching your skin causes raised, inflamed lines or welts These marks tend to go away in less than 30 minutes The condition is also known as dermatographism and skin writing The cause of dermatographia is unknown, but it may be related to an infection, emotional upset or a medicine you're taking
  • Atopic dermatitis (eczema) - Symptoms and causes - Mayo Clinic
    Atopic dermatitis (eczema) is a condition that causes dry, itchy and inflamed skin It's common in young children but can occur at any age Atopic dermatitis is long lasting (chronic) and tends to flare sometimes It can be irritating but it's not contagious People with atopic dermatitis are at risk of developing food allergies, hay fever and asthma
  • Anaphylaxis - Symptoms causes - Mayo Clinic
    Anaphylaxis is a severe, potentially life-threatening allergic reaction It can occur within seconds or minutes of exposure to something you're allergic to, such as peanuts or bee stings Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock — blood pressure drops suddenly and the airways narrow, blocking breathing Signs and symptoms
  • Allergies - Symptoms and causes - Mayo Clinic
    Allergy symptoms can range from mild to severe, even life-threatening Find out what treatments and prevention tips can help
  • Hives and angioedema - Diagnosis and treatment - Mayo Clinic
    Medications Treatments for hives and angioedema may include prescription drugs: Anti-itch drugs The standard treatment for hives and angioedema is antihistamines that don't make you drowsy These medications reduce itching, swelling and other allergy symptoms They're available in nonprescription and prescription formulations Drugs that suppress the immune system If antihistamines are not
  • Chilblains - Symptoms and causes - Mayo Clinic
    Chilblains (CHILL-blayns) is a condition that causes inflamed swollen patches and blistering on the hands and feet It's caused by exposure to damp air that's cold but not freezing Symptoms may show up a few hours after being in the cold Chilblains can be prevented by limiting your time in the cold, dressing warmly and covering exposed skin If you do get chilblains, keeping the skin warm
  • Chronic hives - Diagnosis and treatment - Mayo Clinic
    Diagnosis 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 might be asked to keep a diary to keep track of:





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