Anorectal Fistula is a chronic abnormal communication between the epithelialised exterior of the anal canal and usually the perianal skin. An anal fistula can be characterized as a narrow tunnel with its internal opening in the anal canal and its external opening in the skin near the anus. Anal fistulae generally occur in people with a history of anal abscesses. They can form when anal abscesses do not heal accordingly. Anal fistulae originate from the anal glands which are located between the internal and external anal sphincter and drain into the anal canal. If the outlet of these glands becomes blocked, an abscess can form which can eventually extend to the skin surface. The tract formed by this process is a fistula.