urticaria hemorrhagica

urticaria hemorrhagica.

See hemorrhagic urticaria.

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urticaria

a vascular reaction of the skin that is commonly immunologically based or may be due to direct exposure to a chemical. Marked by transient appearance of slightly elevated patches (wheals) which are redder or paler than the surrounding skin and often attended by severe itching; called also hives. The wheals may be in very large numbers, mostly over the body, 0.5 to 2 inches in diameter and there is no discontinuity of the epithelium. Called also nettle rash.

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giant urticaria, urticaria gigantea

angioneurotic edema.

heat reflex urticaria

see cholinergic pruritus.

urticaria hemorrhagica

purpura with urticaria.

urticaria medicamentosa

that due to use of a drug.

nasolacrimal urticaria

conjunctivitis and rhinitis caused by hypersensitivity to inhaled allergens (atopy).

papular urticaria, urticaria papulosa

an allergic reaction to the bite of various insects, with appearance of lesions that evolve into inflammatory, increasingly hard, red or brownish, persistent papules. See also lichen.

urticaria pigmentosa

a proliferative disorder of mast cells in humans; a similar disease has been reported in young cats. There is erythema and hyperpigmentation of the mouth, chin, neck and eyes.