Men’s buttocks are always sweaty, i.e., sweaty buttocks, which may be related to physiological factors such as wearing tight clothing, or diseases such as hyperhidrosis and hyperhidrosis. 1. Physiological factors: if often wear tight clothing, too much clothing or strenuous exercise, some men may appear buttocks always sweaty. 2. Hyperhidrosis: its cause may be related to diseases, drugs and mental factors, patients will appear the whole body or local sweating abnormally increased. 3. Hyperhidrosis: its cause is considered to be abnormal secretion function of the top secretory glands, the environment and bacterial decomposition and other factors, the clinical manifestations of the armpits, groin, anus and other places sweating, and there is a pungent odor. There are many reasons that lead to excessive sweating on the buttocks of men, and after excluding physiological factors, it is recommended that patients seek medical examination in a timely manner to clarify the cause of the disease.