Chronic allergic purpura can be treated with glucocorticoids, non-steroidal anti-inflammatory drugs or cytotoxic drugs, etc. The specific medication needs to be decided according to the specific type, and it is recommended to consult a doctor in time and follow the doctor’s instructions. 1. Chronic allergic purpura can be categorized into simple, joint, abdominal and renal types, etc. The clinical manifestations of different types are different, and the treatment is also not the same. In general, most of the chronic allergic purpura is self-limiting, if the symptoms are not very serious, you can pay attention to rest, away from sensitizing factors, avoid taking suspicious drugs, often after a period of time can be relieved on their own. 2. Simple chronic purpura can be treated with topical glucocorticoids (Dexamethasone acetate cream, hydrocortisone butyrate ointment, etc.). Arthralgia is obvious and can be treated with ibuprofen and aspirin. Abdominal purpura can be considered in combination with cyclophosphamide and other drugs. Renal purpura should be treated with glucocorticosteroids (prednisone, methylprednisolone, etc.) as appropriate. The specific use of drugs should follow the doctor’s instructions, do not take drugs.