Children’s allergic purpura is a kind of disease that is easy to recur and difficult to be cured completely, patients need to have long-term review according to the condition. Henochromatosis purpura is a common vascular allergic reaction disease, which is caused by genetics, infection, drugs, vaccines and some foods, etc. Children may have symptoms such as skin petechiae and ecchymosis, joint swelling and pain, abdominal pain, blood in the stool, hematuria, proteinuria, etc. The symptoms of Henochromatosis purpura are similar to those of drug rash, thrombocytopenic purpura, and other diseases. Since it is difficult to cure children’s purpura completely, its symptoms are easily confused with those of drug rash, thrombocytopenic purpura, lupus nephritis and other diseases, and it is easy to recur, children may need to undergo long-term review under the guidance of the doctor, patients should pay attention to rest in their daily life, avoiding traumas and scratching of the skin, paying attention to monitoring the changes of the condition, and reviewing the condition in a timely manner in case of any abnormality.