Allergic purpura recurrence needs to be treated through general measures, medication, other treatments and so on. 1. General measures: in the acute stage, patients need to rest in bed, can elevate the purpura and edema parts, do not rub, scratch the affected area. At the same time need to avoid strenuous exercise, keep the skin clean, need to find and remove the causative factors. 2. Drug therapy: patients with recurrence need to use immunosuppressants as prescribed by the doctor, such as morphine macrolide, cyclophosphamide, cyclosporine, tacrolimus, azathioprine and so on. For mild to moderate pain, acetaminophen, ibuprofen and other non-steroidal anti-inflammatory drugs can be used on medical advice, and for severe pain, dexamethasone, prednisone and other glucocorticoids should be used on medical advice. 3. Other treatments: For patients with poor results of conventional treatments and more relapses, it is necessary to consider plasma replacement therapy with the doctor. All in all, patients with purpura need to strengthen their daily life management, keep away from disease-causing factors, have regular follow-ups, and under the guidance of a physician.