Moisture in the perianal area may be related to anal incontinence, anorectal diseases, sweating, etc. 1. Anal incontinence, may be due to congenital defects or acquired perianal surgery complications, ultimately causing the anal sphincter muscle relaxation, and intestinal feces and intestinal mucus from the anus overflow, which leads to the skin around the anus appear moist. 2. Anal and intestinal diseases, such as perianal abscess, sinusitis, anal fistula, ulcerative colitis, colon polyps or intestinal tumors, etc., may lead to intestinal mucus and its secretions from the anus, resulting in perianal skin moisture. 3. Sweating, if you sit still for a long time, in a hot and stuffy environment, wear pants too tight, body fat, etc. are easy to lead to perianal sweating, which will lead to a sense of moisture. Perianal moist feeling, serious people are recommended to actively seek medical attention, clear cause, follow the doctor’s instructions for targeted treatment, to avoid aggravation of the condition.