Purpura may be caused by allergic purpura, idiopathic thrombocytopenic purpura, stress purpura and other diseases, different treatment methods for different diseases, some of which can be self-cured, but also can be cured by medication and general treatment. 1. Anaphylactic purpura: manifested as hemorrhagic spots and purpura on both lower limbs, with normal platelets, this disease can be cured by paying attention to rest and regular life and diet. Topical glucocorticoids such as hydrocortisone butyrate can be used. Non-steroidal anti-inflammatory drugs such as acetaminophen and ibuprofen can be given when arthralgia is obvious. Abdominal purpura requires aggressive treatment with systemic glucocorticoids or even combined cytotoxic drugs (cyclophosphamide). Severe renal purpura requires systemic glucocorticoid therapy. 2. Idiopathic thrombocytopenic purpura: In addition to purpura and petechiae on both lower extremities, other parts of the body will also appear, and thrombocytopenic. This disease requires perennial oral glucocorticoid drugs, such as dexamethasone, prednisone, etc., but it is very easy to relapse. 3. Stress purpura: usually seen in older people, purpura and ecchymosis appear in exposed areas and can usually heal on its own. Once purpura appears, you must first come to the hospital for an interview, do a blood routine, and exclude factors such as thrombocytopenia. After clarifying the cause of the disease, standardized treatment under the guidance of the doctor, do not self-medication, so as not to delay the condition.