The formula of Foot Qi San is Thorny Scabious, Angelica dahurica, and withered alum. It has the efficacy of dispelling wind and drying dampness, killing insects and relieving itching. Used for the treatment of foot dampness caused by dampness and heat impregnation of the skin, the symptom is seen between the toes impregnated with whitening, vesiculation, itching, fat and water impregnation, or even scratched and stained into pus, red sores, accompanied by a foul smell. It should be noted that this drug is a topical agent, do not take internally, not into the eyes, mouth, nose and other mucous membranes; is not applicable to hyperkeratotic tinea pedis, pimple scaly tinea pedis; spreading the drug should be depending on the size of the area of the lesions to the extent of the coverage; the use of the symptoms do not improve within 1 week, or between the toes of the vesicles oozing, itching should go to the hospital for medical attention. If you need to use this medicine, it is recommended to do so under the guidance of a doctor.