The skin on the soles of the feet may be foot fungus, and may also be caused by sweat herpes, palmoplantar pustulosis and other causes. 1. foot fungus: foot fungus is a skin disease caused by fungal infections, manifested as pinpoint-sized blisters on the feet, which can form vesicles, and the symptoms of flaking and peeling will appear after the blisters dry up. 2. Sweat herpes: Sweat herpes is a blistering skin disease that occurs on the hands or feet, accompanied by a certain burning or itching sensation, and the blisters dry up and may lead to flaking. 3. Palmoplantar pustulosis: palmoplantar pustulosis is a chronic skin disease that occurs on the palms of the hands or soles of the feet, mainly manifested as aseptic pustules on the palms of the hands or soles of the feet, with erythema and peeling after the pustules subside. To summarize, the skin on the soles of the feet may be foot fungus, there may be other causes, it is recommended that patients go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease to give targeted treatment.