What is anal fissure? An anal fissure is a small tear or cut in the skin lining the anus which can cause pain and/or bleeding. What are the symptoms of an anal fissure? Extreme pain during defecation and red blood streaking the stool. A patient may try to avoid defecation because of the pain. What causes an anal fissure? A hard, dry bowel movement can cause a tear in the anal lining, resulting in a fissure. Other causes of a fissure include diarrhea and inflammation of the anorectal area. How can a fissure be treated? An acute fissure is managed with non-operative treatments and over 90% will heal without surgery. Bowel habits are improved with a high fiber diet, plenty of fluids to avoid constipation. Warm baths for 10-20 minutes several times are recommended. A chronic fissure (lasting greater than one month) may require additional treatment. What is surgical procedure for anal fissure ? Surgery usual consists of a small operation to cut a portion of the internal anal sphincter muscle. This helps the fissure to heal by decreasing pain and spasm. Commonly done surgery: Lateral sphincterotomy, Excision of anal fissure.