Hives (Urticaria & Angioedema) Center

Hives, also called urticaria, is a raised, itchy area of skin that is usually a sign of an allergic reaction. The allergy may be to food or medications, but usually the cause of the allergy (the allergen) is unknown. Read more: Hives (Urticaria & Angioedema) Article

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Medically Reviewed by a Doctor on 1/16/2018

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