Urticaria is a common allergic skin disease. When exposed to allergens, red plaques of different shapes and sizes will appear in unspecified parts of the body. These patches itch. If you don't stop contact with allergens and treat them, the rash and itching will get worse. Antibiotics are often used when you are infected, and don't eat them for the time being when you are allergic to certain foods. Chronic infection focus is often the cause of chronic urticaria. However, the etiology of some patients with urticaria is difficult to determine or find. In addition to antihistamines, reserpine, aminophylline, Anluoxue, 6- aminocaproic acid, vitamin K, vitamin E, vitamin B 12, histamine globulin, transfer factor and procaine can be used for treatment.