Allergic purpura is always recurring, you need to pay attention to whether the kidneys are damaged or not, and the specific treatment depends on the condition. Allergic purpura can be divided into simple skin type, abdominal type, joint type and renal purpura, and there can also be multiple forms of mixed purpura. If there is only skin damage, no arthralgia and renal damage, and no abdominal pain and other discomfort, the prognosis is generally good. After giving desensitization and symptomatic treatment, if there are still recurrent attacks, you can usually take oral vitamin C and rutin tablets to reduce vascular permeability and maintain observation treatment. Attention needs to be paid to regular rechecking of urine routine to avoid the appearance and renal damage without timely intervention treatment. If allergic purpura, in addition to skin with purpura, accompanied by abdominal pain, arthralgia, kidney damage of any one or several conditions, need to systematically give drugs symptomatic treatment, may be applied to glucocorticoids, etc.. This kind of situation is complicated and needs to be formulated by professional doctors according to the actual situation. Even if the condition still recurs after treatment, you need to go to the hospital for review and be given guidance by professional clinicians for each step of the treatment plan.