Athlete's foot is a disease caused by fungal infection, and it is not directly related to a lack of vitamins or trace elements. Some patients lacking vitamins or trace elements have symptoms very similar to those of athlete's foot, but the fundamental causes of their conditions are different. If it is hard to distinguish, one can go to the dermatology department of a regular hospital to have a fungal test done. Therefore, it is not necessary to supplement vitamins or trace elements to treat athlete's foot. It requires the application of antifungal ointments externally, and the treatment period must be long in order to kill the deep-seated fungi and achieve complete eradication. After healing, it is also important to prevent the recurrence of the condition; do not go to public baths or swimming pools, avoid contact with irritating substances, and if there is someone else in the household with the same disease, they must be treated together.