Urticaria Cholinergic

Urticaria is an allergic reaction characterized by a rash on the skin. Small pale pink itchy spots represent swelling of the papillary layer of skin due to the accumulation of blood in its cavities. At first, the rash may resemble a pimply rash, but then transforms into the typical large pink or whitish-yellow blisters. Often, it is with the appearance of yellow blisters that “wavy” urticaria begins, which lasts for a very long time: more than a week or a month. The source of the blister is the dilation of the capillaries of the skin as a result of dilation of its blood vessels. In addition, with acute urticaria, there is a burning sensation at the site of the rash, and itching is possible. As a rule, one large blister appears first, it quickly increases in size, reaches a large size, and the skin over it is very itchy and swollen. Further, such rashes spread over the entire surface of the body. Typically, rashes due to urticaria are localized primarily on the abdomen, upper extremities, and neck; There is intense skin itching and the itching intensifies at night.