Foot fungus is caused by a dermatophyte infection. The dermatophytes will be divided into three types, one is the genus Epidermophyton, one is the genus Microsporum, and one is the genus Trichophyton. 1. Epidermolysis bullosa: the proportion of the causative agent of tinea pedis is relatively small, and is dominated by flocculent epidermolysis bullosa. 2. Microsporum genus: extremely rare in foot fungus pathogenic bacteria, is mainly gypsum-like microsporum. 3. Trichophyton: closely related to foot fungus, it is more common among the causative organisms of foot fungus. It also includes Trichophyton interuptus, which is dominated by Trichophyton rubrum. It can lead to skin erythema, molting and itching. Foot fungus-causing bacteria are constantly transmitted from person to person, so it is advisable to take precautions in life. As soon as the infection is detected, it needs to be treated.