Moisture around the anus is mainly due to some diseases around the anus triggered by clinical symptoms, such as perianal eczema, hemorrhoids, infectious diseases, anus localized sweat glands are developed, as follows: 1, perianal eczema: common perianal eczema, perianal eczema will lead to localized exudation of the skin around the anus, resulting in wetness around the anus. 2, hemorrhoids: there may be hemorrhoids, hemorrhoids can lead to anal The closure is not tight, resulting in intestinal mucus leakage to the anus around the anus, and cause anal wet. 3, infectious diseases: there are some infectious diseases, such as anal fistula, perianal abscess, etc., will also lead to pus symptoms and make the anus wet. 4, the anus localized developed sweat glands: some of the anus localized sweat glands are more developed, sweating is more, will also trigger the anus wet. Due to the localized moist anus, will increase the probability of the occurrence of localized anal diseases, easy to breed bacteria, so usually should pay special attention to the localized cleanliness of the anus, hygiene, every time after defecation as well as before going to bed to develop the habit of warm water to wash the anus.