Pediatric allergic purpura is usually treated with drugs that improve microcirculation to improve the coagulation status of the patient. Once vasculitis occurs, it may initiate coagulation and fibrinolysis in the blood system, so patients will be given Lutin and Pansentine type of drugs to improve the microcirculation and improve the coagulation status of the patient. Anti-allergic drugs may also be added, such as paracetamol or cetirizine, which are anti-allergic drugs, if the rash is very severe in some children. Some children have high vascular permeability or have more rashes with a little movement, so sometimes oral medications such as vitamin C are added. The above drugs are not essential, because mild purpura can recover on its own, more serious purpura patients who have digestive tract involvement, severe gastrointestinal bleeding, blood in the stool, vomiting blood, frequent vomiting, to give patients hormone therapy. The clinical use of methylprednisolone intravenous points, will be determined by the patient’s condition, hormone therapy by kilogram of body weight, will gradually reduce the amount of hormone as the patient’s condition gets better. If the patient has obvious kidney involvement, i.e., proteinuria, hematuria, or a relatively large amount of proteinuria and hematuria, the patient will be given additional immunosuppressive drugs, such as primidone or rehmannia or intravenous cyclophosphamide shock therapy, to quickly get the patient’s renal proteinuria or hematuria under control, which is more beneficial to the patient’s improvement of renal function as well as prognosis. Because the side effects of the drug are relatively large, and hormones can not be taken for a long time, you need a professional doctor to adjust the drug dosage. Therefore, this disease is special and requires special regular treatment and long-term follow-up.