Pediatric allergic purpura is a disease that can heal on its own. If the child has simple skin changes, that is, a simple skin rash, with rest and simple treatment, it may heal itself, with a little oral medication, which can give vitamin C, dipyridamole, and anticoagulant medication, and with dietary control, it is able to heal itself. However, in more severe cases of purpura, such as abdominal pain, gastrointestinal symptoms, joint symptoms, or kidney damage in the later stages, the chances of self-healing are not particularly high if no treatment is given. Therefore, early intervention is needed. For example, if abdominal pain is accompanied by vomiting, which in severe cases can lead to vomiting blood or blood in the stool, it is difficult to recover without medication, and most of the time, hormones are used. If the symptoms are serious, hormone may not be able to treat, need to add immunosuppressant, control the digestive symptoms, joint symptoms can be relieved with hormone, if the kidney damage is relatively mild, it can be slowly recovered by giving very little adjuvant therapy, if a large amount of proteinuria occurs, we must strive to do a renal biopsy, and choose to use the drug according to the clinical symptoms and pathologic phenotyping.