Water in the anus refers to anal dampness, consider whether it is an anal intestinal type of disease, such as anal fistula, internal hemorrhoids, sphincter relaxation, etc. In the case of anal fistula, mucus and feces in the rectal canal can flow out of the body through the external opening without passing through the anal opening, making the area around the anus moist and often accompanied by symptoms such as odor. When the internal hemorrhoid develops to a certain stage, the nucleus and enlargement of the hemorrhoid are dragged out of the anus, resulting in poor closure of the anus and the outflow of mucus, producing a feeling of moist and watery. Sphincter relaxation mainly occurs when the internal sphincter is relaxed due to repeated stimulation by inflammation and infection, resulting in inability to completely close the anus, and mucus in the rectal canal flows out through the anal opening and stays in the perianal area, causing the feeling of water around the anus. In addition, some patients have excessive perianal sweat due to developed sweat glands or excessive activity, which is not cleaned in time, and this symptom also occurs.