Idiopathic thrombocytopenic purpura (ITP), now also known as primary immune thrombocytopenia, is an acquired autoimmune disease that is caused by the production of anti-platelet autoantibodies in the body resulting in excessive destruction of platelets by the reticuloendothelial system thus causing thrombocytopenia. The annual incidence of the disease is (50 to 100)/106, and more than half of them are children. ITP in children starts within a few days or weeks after infection, and the proportion of males and females is similar. 70% to 80% of children can recover, while the remaining 20% to 30% may develop chronic ITP. 12 months). There is no consistent opinion on the timing and choice of treatment options for patients with ITP. Treatment should primarily target bleeding and should not overemphasize raising the platelet count to normal levels. The name of this disease is not recorded in ancient Chinese medical texts, but in terms of its clinical features, it should belong to the category of epistaxis and hematemesis. The main cause and mechanism of the disease is due to the external wind-heat evil, the heat and toxicity are so strong that the blood is forced to travel; the heart and spleen are deficient, the heart does not control the blood, the spleen does not control the blood, the qi does not take in the blood, resulting in the blood overflowing outside the veins. The disease is prolonged due to the deficiency of spleen and kidney yang or liver and kidney yin deficiency, resulting in purpura delayed and difficult to heal.