Urticaria, commonly known as wind rash block, ghost rice bumps, is a very common allergic disease in dermatology. A. Causes 1, mainly food, such as eating fish, shrimp, seafood, beef and mutton, milk, eggs, etc. 2, inhalants, such as pollen, dust mites, these are also the cause of occurrence. 3, drugs, such as penicillin, sulfonamides, etc., for allergic people, after taking will lead to hives. 4, infection factors, whether it is a virus, bacterial infection, may lead to the occurrence of hives. 5. Physical factors, such as sunlight, stress, cold, etc., may lead to the appearance of hives. 6, there are other causes. Second, the treatment 1, to find the cause, and as far as possible to avoid these suspected causes 2, symptomatic anti-allergy, desensitization treatment, commonly used drugs like loratadine, cetirizine, epalrestin and other such drugs have a certain effect.