An anal fissure is a small tear in the lining of the anal canal. The most common cause of anal fissures is large or hard stool passing through the anal canal during bowel movements, also constipation and straining during bowel movements, inflammation of the ano-rectal area, such as is caused by inflammatory bowel disease (IBD) and rarely an anal sex. Anal fissures are fairly common and usually heal without treatment or with nonsurgical treatments. Signs and symptoms may go away within two weeks, but it may take up to eight weeks for the tear to heal. If the tear doesn't heal within six to eight weeks, however, you may need surgery. Self care tips includes adding fiber to diet, taking adequate fluids, regular exercise, Soaking in warm water for 15 to 30 minutes one or more times a day, especially after bowel movements, will help ease pain and itching and Avoid straining during bowel movements. An anal fissure can be prevented by taking measures to prevent constipation like eating high-fiber foods, drink fluids and exercise regularly to keep from having to strain during bowel movements.