Problem analysis: Urticaria is a common skin disease. It is a skin mucosal vascular reactive disease caused by many different reasons. It is characterized by a red or white itchy air mass with clear edges. Generally, there is no cure. Guidance: It is suggested to find out the reasons and eliminate them. Antibiotics should be used frequently in the case of infection, and should not be eaten temporarily in the case of allergic to certain foods. Chronic infection focus is often the cause of chronic urticaria. Give antihistamines, hormones and calcium.