Ringworm on the stomach may be caused by ringworm, chronic eczema, psoriasis, pityriasis rosea and other diseases. 1. Ringworm: it is a contagious skin disease due to fungal infection, which occurs in the waist, abdomen, trunk, face and neck, etc. It manifests itself as a ring-shaped spot with a clear boundary, varying in size and shape, with heavier inflammation at the edge and more scales, often with some small pimples or blisters, and itchy. 2. Chronic eczema: it is due to a variety of internal and external factors that lead to skin inflammation reaction, can occur in any part of the body, mostly symmetrical onset, manifested as hypertrophic skin plaques, varying degrees of moss-like, hyperpigmentation and other symptoms, the condition of the light at times and at times, can be self-conscious of obvious itchiness, often paroxysmal. 3. Psoriasis: commonly known as “psoriasis”, may be related to environmental factors, genetic factors, immune factors, etc., can be confined to one place, or the whole body is widely distributed, manifested as scaly skin erythema or plaques, most of the patients aggravated or relapsed in winter, and can be relieved in summer. 4. pityriasis rosea: a kind of inflammatory skin disease of unknown etiology, common in the trunk and limbs, typical symptoms are covered with furfuraceous scales of rose-colored patches, papules, round or ring-shaped, clear borders, can be accompanied by different degrees of itching. Ringworm on the stomach may also be due to other factors, it is recommended that patients seek medical attention in a timely manner to clarify the cause of the disease, under the guidance of the doctor for targeted treatment.