General desensitization therapy can not treat allergic purpura, the treatment of allergic purpura needs to take general measures, drug therapy, other treatments and other ways. 1. General measures: patients need to be clear and away from allergens, bed rest in the acute stage, avoid strenuous exercise, keep the skin clean, avoid scratching, prevent infection. 2. Drug therapy: patients should follow the doctor’s instructions to use antihistamines such as iproniazine hydrochloride and loratadine; if the symptoms are severe, glucocorticoid drugs such as prednisone and methylprednisolone should be used; if the effect is not good, immunosuppressant drugs such as cyclophosphamide and azathioprine can be used. For people with obvious joint pain, non-steroidal anti-inflammatory drugs such as ibuprofen can be used. 3. Other treatments: For patients with intractable conditions, plasma replacement therapy should be considered, which to a certain extent can effectively alleviate the relevant clinical symptoms and improve the patient’s prognosis. Patients with purpura are advised to go to the hospital in time and cooperate with the doctor to carry out standardized treatment to avoid delaying the condition.