The main difference between jock itch and eczema is that jock itch is caused by fungal infection, the pathogenesis of eczema is not clear, and the former is somewhat infectious, the latter is not infectious. Ringworm is mainly caused by the infection of Trichophyton rubrum, Microsporum canis, Trichophyton suis, Trichophyton verrucosum, etc. It can be transmitted through direct infection and indirect infection. It can be transmitted through direct and indirect infections. The etiology of eczema is unknown and may be related to internal factors such as endocrine and metabolic changes, chronic infectious lesions, neurological factors, genetic factors, or triggered by external factors such as the living environment, food, and inhalants. Both eczema and tinea cruris can manifest as erythema with itching, and eczema can spread all over the body with unclear borders. Ringworm occurs in the groin area, buttocks, perineum and perianal area, the boundary is clearer. Discovery of skin abnormalities should be promptly go to the hospital dermatology department.