Anal fistula is a track lined by granulation tissue which opens deeply in the anal canal or rectum and superficially on the skin around the anus. Mostly these fistula develop from ano-rectal abscess which burst spontaneously or was incised inadequately.
Rupture or drainage of anorectal abscess,secondary cause of Anal fissure are crohn’s disease,ulcerative colitis,carcinoma,tuberculosis.
Clinically Anal fissure is characterised by pain,discomfort in anus with difficulty in sitting,better after pus discharge,irritation of skin around the anus.
Maintain local hygiene,improve general health,drink plenty of water,avoid trauma to the affected part.