Allergic purpura is one of the most common vasculitis in childhood, with non-thrombocytopenic purpura, arthritis, arthralgia, abdominal pain, gastrointestinal bleeding and nephritis as the main clinical manifestations. The disease occurs mostly in school-age children, and the common age of onset is 7 to 14 years old, with an annual incidence of 14/100,000 population. The ratio of male to female is 2:l. The onset of the disease is more in winter and spring. The etiology and pathogenesis are not yet fully understood. Infections, food, drugs, pollen, insect bites and vaccinations can be used as sensitizing agents to produce allergic reactions in the sensitive organism, and most children have a history of upper respiratory tract infections before the onset of the disease. The main pathological change of the disease is systemic small vessel vasculitis, which can involve micro-arteries and micro-venules in addition to capillaries. The incidence of this disease tends to increase year by year, and the cutaneous form of purpura can be recurrent and prolonged for several weeks, months or even more than a year. About 1/3 of the patients have up to 10 recurrences during the follow-up period. About 30% to 50% of the children develop renal damage, manifested as hematuria or microscopic hematuria and proteinuria, and in some children the hematuria and proteinuria can last for several years. Therefore, the disease is characterized by long duration, many complications, high recurrence rate, and few clinical options for drugs. This disease belongs to the category of “hair spots” and “blood evidence” in Chinese medicine, and there are “epistaxis”, “grapevine disease”, “spotted rash”, “blood rash” and “blood rash”. It has the names of “epistaxis”, “grape disease”, “spotted rash”, “spotted poison” and so on. According to the different types of the disease, Chinese medicine also classifies them as “spotted rash”, “abdominal pain”, “blood in stool”, “paralysis” and “blood in urine”. The disease is classified as “rash”, “abdominal pain”, “blood in stool”, “paralysis”, “blood in urine”, “edema”, etc. In recent years, allergic purpura has become the main diagnosis and treatment disease of Chinese medicine in our hospital. Under the guidance of the clinical experience of the famous old Chinese medicine doctor Pei Xueyi, we have adopted the treatment method which is mainly based on Chinese medicine treatment and supplemented by western medicine treatment, combining the identification of evidence and disease, showing better efficacy, shortening the course of treatment and reducing the recurrence rate, providing an effective way for the treatment of this disease. There are more and more patients coming from all over the country, but beds are limited, so it is best for patients from outside the country to call first to see if there are beds available, to avoid waiting for a long time or making a trip for nothing. Liu Jing, Department of Traditional Chinese Medicine, Beijing Children’s Hospital