Urticaria

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urticaria

[‚ərd·ə′kar·ē·ə]
(medicine)
Hives or nettle rash; a skin condition characterized by the appearance of intensely itching wheals or welts with elevated, usually white centers and a surrounding area of erythema. Also known as hives.

Urticaria

 

nettle rash, an allergic reaction characterized by the sudden and rapid appearance on the skin (sometimes also on the laryngeal mucosa) of intensely itching wheals.

Urticaria is often caused by the sting of the nettle and certain other plants. Insect bites, temperature, and chemical agents are also among its causes. Other factors include parasitic worms, chronic constipation, liver and kidney diseases, and allergic sensitivity to some foods (for example, strawberries, citrus fruits, eggs, mushrooms, preserves, certain fish, pork, and chocolate). Urticaria is sometimes caused by hypersensitivity to drugs (especially to those of chemical origin). The rash associated with the condition is a manifestation of the inflammatory reaction and edema of the skin that result from a sudden increase in the permeability of the capillaries in the area. This results from the liberation of histamine from the mast cells of the skin by allergic alteration. Urticaria usually disappears without a trace within a few hours, although it sometimes recurs. It is treated by purgation (by enemas, laxatives), special diet (mostly milk and vegetables, with limited salt intake), and desensitizing and anti-histaminic agents.

REFERENCE

Pavlov, S. T. Kozhnye i venericheskie bolezni, 2nd ed. Moscow, 1969.

R. S. BABAIANTS

References in periodicals archive ?
Patricia Hackett, 71, from Sunderland, suffers from cold urticaria
Cold urticaria sufferers can have problems in New England winters, but they can limit time in the cold, cover exposed skin and be treated with medications to help the symptoms.
Rupatadine (Rupafin) resets the critical temperature threshold markedly downward in patients with cold urticaria, which is a benefit of great practical significance, said Dr.
Classification of urticaria Type Subtype Spontaneous urticaria Acute and chronic spontaneous urticaria Physical urticaria Cold urticaria Delayed pressure urticaria Hot urticaria Solar urticaria Dermographism Vibration urticaria Other Aquagenic urticaria Cholinergic urticaria Contact urticaria Exercise induced anaphylaxisurticaria Table 2.
Even in summer, Alan can suffer from cold urticaria with a swollen tongue, and heart and arm pains similar to a heart attack.
The mum-of-one suffers from cold urticaria, an allergy so rare, even the doctors who delivered her baby thought it was made up.
This syndrome has fallen under the umbrella of so-called autoinflammatory diseases, which also include neonatal-onset multisystem inflammatory disease and familial cold autoinflammatory syndrome, formerly called chronic cold urticaria, Dr.
Sir, we report two cases of cold urticaria, who were confirmed on rechallenge.
It also is contraindicated in patients with Raynaud's disease, cold urticaria, or cryoglobulinemia.