Allergic violet epilepsy is one of the most common vasculitis during childhood days, with non-thrombocytopenic violet epilepsy, arthritis or arthralgia, gastrointestinal and renal pathologies as the main clinical manifestations. The disease occurs mostly in preschool children and is more frequent in the fall and winter. Most of them have a history of respiratory tract infection before the onset of the disease. Clinical manifestations: 1. Characteristic manifestations: recurrent skin purpura is the characteristic manifestation of this disease. It is mainly distributed in the weight-bearing parts such as distal lower limbs, ankle joints and buttocks. Other parts such as upper limbs and face may also appear. The characteristic rash is a small urticarial rash or pink papules above the skin, and some children often have abdominal pain, mostly around the umbilicus. It may be accompanied by vomiting, bloody stools, or even hemoptysis, and when the kidneys are involved, the clinical manifestation is hematuria. The severity of the disease varies. In severe cases, renal failure and hypertension may occur. Most children with allergic violet epilepsy have only joint pain, while a few patients may have arthritis. Rare symptoms include central nervous system symptoms: such as coma, subarachnoid hemorrhage, and optic neuritis. The treatment of the disease includes supportive and symptomatic treatment and drug therapy. (1) Supportive and symptomatic treatment: bed rest in the acute stage. Pay attention to the amount of rehydration, nutrition and maintaining the electro-flocculent balance. (2) Drug therapy: Glucocorticoid hormone has significant effect on improving skin and joint symptoms, but when skin or joint lesions alone. Glucocorticosteroid treatment is not preferred. Those with severe gastrointestinal lesions can take oral prednisone with renal lesions. Glucocorticosteroids and immunosuppressants have some efficacy. The blood picture and other adverse effects should be closely monitored. (3) The care of the disease is very important, should try to avoid respiratory infections, avoid recurrence of the disease, when the child abdominal pain is obvious, attention should be paid to differentiate from the shell acute abdomen, should be long-term regular outpatient follow-up, regular examination of the physical and chemical indicators.