Dry and flaky buttocks may be caused by chronic eczema, fungal infection and dry skin. 1. Chronic eczema: Inflammatory reaction of the skin caused by internal and external stimulation of various factors, chronic eczema may cause dry skin, moss-like changes, which may lead to dry buttocks and skin. 2. Fungal infection: ringworm caused by fungal infection may also cause dry skin flaking, mostly accompanied by itching and other symptoms. 3. Dry skin: Dry skin, not paying attention to moisturizing care, dry air in the external environment, lack of water in the body and other reasons can also cause dry buttocks peeling phenomenon. Butt dry skin, there may be other reasons, it is recommended to go to the hospital for examination, clear cause of the disease, and then follow the doctor’s instructions for treatment.