Urticaria is a common disease in dermatology, the causes of hives are also varied, the common causes are: first, inhalation of external things, such as dust, pollen, dust mites, animal fur, mold and so on. Second, eating things, such as fish and shrimp seafood, beef and mutton, milk, eggs. Third, drugs, commonly used cephalosporins, penicillins, sulfonamides. Fourth, systemic diseases, especially some autoimmune diseases. Fifth, there may be a relationship with viral or bacterial infections. Sixth, there may be a relationship with natural sunlight, temperature and heat factors, and environmental factors, so there are very many reasons for suffering from urticaria. After suffering from hives, you should: first, try to identify the possible causes and try to avoid them. The second, symptomatic treatment, mainly according to the condition of oral anti-allergy drugs, if necessary, need to use anti-infection or anti-virus drugs symptomatic treatment. It is recommended to choose the appropriate treatment plan under the guidance of a specialist.