There is no such thing as platelet-allergic purpura, medically there is allergic purpura, an autoimmune disorder in which the platelet count may be normal or elevated. The following is a description of the causes and treatments of the disease. 1. The occurrence of purpura may be related to autoimmune hyperfunction, and a large number of immune antibodies often appear in the body, resulting in inflammation of capillaries and small blood vessel walls. In addition to purpura lesions, other abnormal symptoms such as abdominal pain, joint pain, etc., may also occur. 2.Allergic purpura often has an acute onset and requires high-dose shock treatment with prednisone and other glucocorticoid drugs as prescribed by the doctor in order to suppress the inflammatory reaction in the body in time and stabilize the condition gradually. If a large number of bleeding spots appear on the skin after contact with allergic substances or viral infections, it is likely to be the manifestation of allergic purpura, which needs to be examined in time and receive regular treatment under the guidance of a physician.