Windbag, also known as urticaria, is a type of limited edema produced by an allergic reaction. The causes are mostly related to food, drugs, infections, hot and cold stimuli, plant pollen, animal fur, psychological factors and other systemic diseases, such as systemic lupus erythematosus and thyroid disease. The main treatment is to get rid of the triggering factors, you can take oral antihistamine loratadine, cetirizine, cyproheptadine, etc. You can also give vitamin C, calcium, etc. to assist in the treatment. When shock, laryngeal edema and dyspnea appear, anti-shock treatment such as epinephrine, dexamethasone and oxygen are needed in time. Those with abdominal pain can be given 654-2 to relieve spasm, and if one antihistamine is ineffective, a combination of 2-3 antihistamines can be used alternately. For those who are recalcitrant, tretinoin treatment can also be given.