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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.



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.


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


References in periodicals archive ?
Ron Simon of the allergy and immunology department of Scripps Clinic and Research Foundation in San Diego, "Cholinergic urticaria happens when the victims goes over the peak of conditioning and becomes overheated, while E.I.A.
Diagnosis of aquagenic urticaria is confirmed by wet cloth at body temperature applied for 20 min and cholinergic urticaria by exercise and hot bath provocation test.1-4,
Cholinergic urticaria: Swelling by metocholin stimulation in the skin and eryhtema and pruritus by exercise, hot, bathing, hot food.
In the course of my research, I came across urticaria brought on by exercise, cholinergic urticaria, as a reaction to water, and as an allergy to gold.
Intertrigo Erythema annulare centrifugum Insect bite Urticaria pigmentosa Cholinergic urticaria Erythema marginatum Erythema chronicum migrans Lyme disease Erythema gyratum repens The second major feature of Clinderm, "approach with diagnosis in mind," provides choices that would lead to a specific diagnosis, which provides users with a glimpse of the disease's characteristics.