Tinea corporis is caused by a fungus. Any superficial damage caused by a pathogenic fungus on the smooth skin of the human body is collectively called ringworm, and ringworm is a special type of ringworm in the pubic-femoral area that can spread to the perineum, perianal area, and buttocks in severe cases. Tinea corporis, also known as ringworm or ringworm, is contagious by contact and is often caused by direct contact with the patient or contact with a bath tub or towel contaminated by the patient, while most cases are caused by the patient’s own infection such as ringworm of the hands, feet, nails, or head. Tinea corporis initially appears as localized skin damage such as erythema, papules or blisters. The key to prevention is to take care of personal hygiene, improve immunity, and actively treat pre-existing diseases such as diabetes. Treatment is based on topical medication, and internal medication is indicated for those whose lesions are generalized throughout the body. The Internet is developing rapidly and is profoundly affecting every aspect of our lives. Internet medicine can improve the efficiency and value of medical services through the Internet, and as a medical worker in dermatology, I am willing to provide services for everyone on this online platform.