An allergic skin reaction of an immediate type caused by a variety of endogenous (internal) and exogenous (external) factors. It is a very common disease - probably every third person suffered it at least once. Among allergic conditions - takes second place after bronchial asthma and can occur at any age.
Symptoms and course:The sudden appearance of numerous blisters on any part of the skin, which are very itchy and bright pink, is characteristic. They have a dense consistency, the size of a palm or more. Their rash lasts 1-2 hours, then the blisters disappear without a trace, but new ones may appear. Usually an attack lasts several hours or days (acute urticaria), but sometimes months and even years (chronic urticaria) continue. The process may be accompanied by malaise, headache, fever.
In clinical practice, the most commonly used classification of urticaria, based on etiological factors, for example, drug, food, mechanical (artificial), cold (reaction to cold can be slow, occurring after 1-2 days), thermal (occurs mainly before menstruation, during pregnancy, in the elderly, more often during the transition from cold to warm), toxic (with direct exposure to skin irritants - nettles, hairs of caterpillars, jellyfish, bees, etc.), light (caused by ultraviolet, infrared asny and visible spectrum rays).
Chronic forms of urticaria are often associated with impaired liver, kidney, gastrointestinal tract functions, helminthic invasions, foci of chronic infection (in the tonsils, dental granulomas, gall bladder and duct, etc.), toxicosis of pregnant women, and decay products of malignant tumors.