Urticaria

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Related to nettle rash: urticaria

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 ?
NETTLE rash - also known as urticaria or hives - is an allergic skin condition.
hing and/or swelling thma, nettle rash and s, you can go into mistakenly treats harmless proteins as a threat to your health.
A URTICARIA is an allergic skin condition sometimes also known as nettle rash or hives.
The formula contains Bisabolol and liquorice extract to ease the irritation from bites, stings and nettle rash.
hen I was practising dermatology I did a three-year research project that looked at hives - otherwise known as nettle rash or urticaria.
2 Itchiness all over with a blotchy rash or spots like nettle rash that come and go.
A red and white, raised rash: Known as urticaria, this looks like nettle rash and disappears after 20 minutes.