Patients always feel wet anus, the main reasons include the following situations: First, perianal eczema: more common in the clinic, can lead to local or near the anus itching, or even oozing fluid, manifested as a more typical wet with itching symptoms. Second, sinusitis or fistula: due to fistula opening in the skin surface, feces or secretion of mucus through the fistula leading to anal wetness, often accompanied by pain and itching. In short, patients often feel anal moist, must go to the specific anorectal hospital for detailed examination, find the cause of the disease, and then take corresponding symptomatic treatment measures.