urticaria (redirected from urticaria hemorrhagica)

urticaria /ur·ti·ca·ria/ (ur?ti-kar´e-ah) hives; a vascular reaction of the upper dermis marked by transient appearance of slightly elevated patches (wheals) which are redder or paler than the surrounding skin and often attended by severe itching; the exciting cause may be certain foods or drugs, infection, or emotional stress.urticar´ial

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urticaria bullo´sa , bullous urticaria that in which bullae are superimposed on the wheals.

cold urticaria  urticaria precipitated by cold air, water, or objects, occurring in a hereditary and an acquired form.

giant urticaria  angioedema.

urticaria medicamento´sa  that due to use of a drug.

papular urticaria  a hypersensitivity reaction to insect bites, manifested by crops of small papules and wheals, which may become infected or lichenified because of rubbing and excoriation.

urticaria pigmento´sa  the most common form of mastocytosis, characterized by small, reddish brown macules or papules that occur mainly on the trunk and tend to urtication upon mild mechanical trauma or chemical irritation.

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ur·ti·car·i·a (ûrt-kâr-)

n.

A skin condition characterized by welts that itch intensely, caused by an allergic reaction, an infection, or a nervous condition. Also called hives, nettle rash.

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urticaria (ur´tiker´ē),

n a vascular reaction pattern of the skin marked by the transient appearance of smooth, slightly elevated patches that are more red or more pale than the surrounding skin and are accompanied by severe itching. Also called
hives.

urticaria, bullosa,

n a skin eruption in which the lesions are capped by blisters.

urticaria, giant,

n See edema, angioneurotic.

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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.

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urticaria Hives Dermatology A condition characterized by pruritic raised red welts on the skin, associated with allergic reactions and histamine release or defects in the complement or kinin systems Risk factors Prior allergic reactions–eg, hay fever and angioedema Triggers Medications; foods–eg, berries, shellfish, fish, nuts, eggs, milk; pollen; animal dander–especially cats; insect bites; mechanical stimulants–eg, water, sunlight, cold or heat; emotional stress; post-infection; linked to other disease–eg, autoimmune diseases SLE, leukemia, etc; may be partially hereditary, dermographism, cold urticaria, echinococcus infection–dog tapeworm, hereditary angioedema, Henoch-Scho¨nlein purpura, mononucleosis, hepatitis, mastocytosis