Anal fistula

Anal fistula is also called "anorectal crest". Most anal fistula is formed by anorectal abscess ulceration or incision and drainage. The abscess gradually shrinks, but the contents of the intestine continue to enter the pus cavity. In the process of healing and shrinking, a tortuous cavity is often formed, and the drainage is not easy to heal. After a long time, there are many scar tissues around the cavity, forming a chronic infectious duct . Traditional Chinese medicine calls this disease "overhang", "sitting horse", "dirty poison", etc. Most of the anal rectal abscesses are ruptured and the granuloma ducts around the anus are formed over time. It is more common in men aged 20-40. Anal fistula generally consists of a primary inner mouth, a fistula arm, and a secondary outer mouth. The inner mouth is mostly located near the tooth line, mostly one, and the outer mouth is located on the skin around the anus, which can be one or more. Anorectal fistula mainly invades the anal canal and rarely involves the rectum, so it is often referred to as anal fistula, which is a granulomatous duct that communicates with the skin in the perineal area. The inner mouth is mostly near the tooth line, the outer mouth is located around the anus and the skin. The entire fistula wall is composed of thickened fibrous tissue with a layer of granulation tissue inside, which will last forever. The incidence is second only to hemorrhoids, more common in young males, and may be related to the strong secretion of sebaceous glands, one of male sex hormone target organs.