Podophyllotoxin is a topical medication used for the treatment of foot odor, its side effects are relatively few, the corrosiveness to the skin is relatively strong, the use of patients with delicate skin or children is not recommended. A small number of people will have an allergic reaction, allergy is mainly manifested in localized flushing, pimples, itching and other symptoms. After the use of foot light powder feet will be obvious molt, mainly caused by local skin necrosis. If allergic symptoms occur during the process of using Podophyllotoxin, it is necessary to stop using it in time so as not to aggravate the symptoms of local allergy. The foot light powder has the efficacy of clearing heat, drying dampness, killing insects, astringent sweating, used for keratosis pilaris caused by dampness-heat injection, and the treatment of smelly sweating. The use of foot light powder needs to be dissolved in boiling water, in order to avoid scalding the case as far as possible while hot foot soak, soak for about 20-30 minutes.