The white patches on the body may be caused by white furfura, vitiligo, sweat patches and other diseases. 1. white chaff rash: white chaff rash is of unknown etiology and is most common in children, often appearing as round or oval white patches of varying sizes on the facial skin. Usually, it can be cured by itself. 2. Vitiligo: Vitiligo is a skin and mucous membrane pigmentation deficiency disease caused by melanin deficiency, associated with genetic, autoimmune and other factors, manifested as white patches of varying sizes on the skin. 3. Sweat patches: Sweat patches belong to the fungal infection caused by the disease, usually occurs in the neck, face and chest and back, there will be white lesions, due to the overgrowth of the Malassezia bacteria caused. A piece of white body may also be caused by other diseases, it is recommended to consult a doctor in time to find out the cause of the disease, to avoid affecting the appearance of the psychological burden.