After excluding the bad factors in living habits, anal malodor needs to be considered for pathological reasons such as anal canal and rectal conditions. For example, in proctitis, the anal sphincter is dysfunctional due to repeated rectal mucosal irritation. Fecal mucus may then be discharged uncontrollably to the outside of the anus, resulting in symptoms such as foul odor and dampness in the anus. In addition, internal hemorrhoids, mixed hemorrhoids and sinusitis may also repeatedly irritate the wall of the anal canal, resulting in anal sphincter contraction disorder and anal malodor and dampness. In addition, anal fistulas are caused by the abnormal passage from the anal canal to the perianal skin, and feces is not discharged directly through the anal canal to the perianal area, causing symptoms such as dampness and bad odor. It is recommended to fully clean the area and keep the perianal area clean and dry. If the symptoms still do not change significantly, you should go to the hospital as soon as possible to do anal finger diagnosis, anoscopy and other related tests to determine the disease, and symptomatic treatment.