Hives (Disease)

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ur·ti·car·i·a / ˌərtiˈke(ə)rēə/ • n. Med. a rash of round, red welts on the skin that itch intensely, sometimes with dangerous swelling, caused by an allergic reaction, typically to specific foods. Also called nettlerash or hives.

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urticaria (nettle rash, hives) (er-ti-kair-iă) n. an itchy rash resulting from the release of histamine by mast cells. Individual swellings (weals) appear rapidly and resolve spontaneously within hours. Angio-oedema occurs when the weals involve the lips, eyes, or tongue, which may swell alarmingly and constitute a medical emergency. acute u. a common and immediate response to such allergens as seafood or strawberries. cholinergic u. a condition in which very small weals are brought on by heat, exercise, or emotion. chronic u. a condition that is not allergic and may persist for years.

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urticaria See hives

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