Can anal fistula heal itself? I believe this is on the minds of too many people. A fistula is a granulomatous canal around the anus, consisting of an internal, fistula and an external opening. It is a common rectal and anal canal disease, second only to hemorrhoids in incidence, and can develop at any age, mostly in young and middle-aged men, probably due to the high secretion of sebaceous glands, one of the male sex hormone target organs. So, can anal fistula heal itself? The acute inflammatory phase or chronic complex anal fistula can be accompanied by systemic symptoms such as fever, anemia, wasting and loss of appetite. The treatment of anal fistula is mainly surgical. Once formed, anal fistulas do not heal on their own probably because of the presence of: 1. the internal opening Although the abscess breaks down or has been incised and drained, the primary source of infection such as anal sinusitis, or anal gland infection still exists, and the contents of the intestinal cavity can continue to enter the fistula through the internal opening. 2, the anal part can not be static, the pus cavity is not easy to bond. When defecating or urinating, the anal sphincter is often in spasm due to sphincter contraction or due to inflammation stimulating the anal sphincter. 3, the intestinal cavity of the feces, intestinal fluid and gas continue to enter the fistula, stimulating the wall of the tube, so that the wall of the connective tissue hyperplasia thickened, the lumen is difficult to close. 4, poor drainage of the abscess cavity, or narrowing of the external mouth, sometimes closed and sometimes collapsed, pus accumulation in the cavity, resulting in abscess recurrence and penetration and the formation of a new branch or fistula. 5.The tube passes through the anal sphincter at different heights, and the contraction of the sphincter hinders the discharge of pus, resulting in poor drainage.