Tinea pedis, or ringworm of the feet, is caused by a fungal infection that may be transmitted to the buttocks when contact is made with the buttocks after not paying attention to hygiene or scratching, and is also known as tinea cruris. Tinea pedis, also known as tinea pedis, is a skin disease caused by fungal infection that can involve the area between the toes and the heel of the foot, manifesting itself as whitening of the skin, blisters on the soles of the feet, and dry and cracked heels, etc., which is contagious, and can be transmitted to the buttocks by the fungus in the area of tinea pedis and form tinea pedis if the daily habits are poor, the hygiene is not up to the standard, or if the immune system is low. The occurrence of tinea pedis is mainly related to humidity, high temperature environment and tinea infections, manifested as buttocks ring-shaped or semi-ring-shaped erythema, border inflammation is more obvious. The emergence of tinea pedis needs timely treatment to avoid the spread of infection, at the same time, daily attention should be paid to personal hygiene, eat a light diet, avoid spicy stimulating food.