The skin type allergic purpura alone usually takes 20-30 days to recover gradually after regular treatment. The main clinical symptom of simple cutaneous allergic purpura is bruising of the extremities, which will first appear as bruised spots and then gradually spread into bruised spots. The patient can be treated with oral anti-inflammatory drugs and topical glucocorticoid creams, which can effectively darken the color of the formed purpura, and it will gradually turn into simple pigmentation after about 1 month and finally disappear completely. Patients need to pay attention to avoid strenuous exercise and rest during the period of illness to avoid further increase in capillary fragility, thus aggravating the condition. In addition, the patient should pay attention to a light diet, quit smoking and drinking, and take regular rest and rest in order to recover from the disease as soon as possible.