Red patches of peeling skin on the body are usually symptoms of eczema, pityriasis rosea, tinea corporis or psoriasis, and require medical consultation to clarify the cause. 1. Eczema: related to a variety of internal and external factors, such as heredity, allergies, infections and so on. The main manifestation is the symmetrical appearance of erythema, papules, flaking and itching. 2. pityriasis rosea: the cause of the disease is unknown, it is thought to be related to viral infection, it is a kind of erythematous scaly disease, which manifests itself as scattered erythematous spots on the body, the erythematous spots are consistent in the long axis and the grain of the skin, and there is a small amount of flaking on the surface. 3. Tinea corporis: it is caused by fungal infection, mainly transmitted through contact. The manifestation is that there are red spots on the skin, and the red spots gradually spread into a ring, with raised edges, flaking in the middle, and obvious itching. 4. Psoriasis: it is related to heredity, infection, immune disorder and other factors. It is characterized by symmetrical erythematous spots and papules on the body, and the rash can be fused into a large area, with scales on the surface, and a little bit of hemorrhage after scraping off the scales. There are many reasons that cause erythema and peeling of the skin on the body, it is recommended to consult a doctor in time to clarify the diagnosis.