Podophyllotoxin cannot be used to treat dandruff. The main ingredients in Podophyllotoxin are bitter ginseng, benzoic acid, boric acid, salicylic acid, etc. It is mainly used for the treatment of Chinese medicine diagnosis of dampness-heat injection (dampness and heat evils invade the intestines, bladder, pubic area, lower limbs, etc.), and can be used to alleviate tinea versicolor and smelly sweating in such patients, but the relevant instructions do not state that it is therapeutic for dandruff increase in the patient. In addition, in the process of using the foot Guangsan, patients may appear contact dermatitis and other adverse reactions, some patients may also appear serious dermatitis, the existence of blistering and vesicular tinea cruris is prohibited, pregnant women and children are also prohibited to use this drug. Therefore, the foot light powder can not be arbitrarily used in the head for the treatment of dandruff, the need to consult a professional physician’s opinion before using the drug, can not be unauthorized use of medication, so as not to delay the condition.