Male anal moisture is usually caused by unclean hygiene, but also may be caused by perianal eczema, anal fistula and other diseases. 1. Hygienic uncleanness: If you usually exercise too much, or do not wipe the anus clean after bowel movement, it will lead to localized moisture, related to hygienic uncleanness. 2. Perianal eczema: perianal eczema is a chronic recurrent inflammatory skin disease that occurs around the anus, the etiology of which is related to trauma, friction and other local factors, hemorrhoids, rectal prolapse and other anorectal diseases such as secretion stimulation, as well as hereditary, mental and other factors. Patients will have obvious local itching, often due to scratching to form vesicles, accompanied by obvious oozing, will lead to anal moisture. 3. anal fistula: anal moisture may also be caused by anal fistula, anal fistula is mainly caused by perianal or perirectal abscess, and secondly, also with poor dietary habits, bad habits and so on. The patient will have a small amount of pus, blood, mucus secretion from the external mouth of the fistula continuously or intermittently, which will lead to anal moisture. The causes of male anal moisture more reasons, it is recommended that patients timely to the hospital examination, a clear diagnosis, as soon as possible to give targeted treatment, to avoid delaying the condition.