An anal fissure is a tear in the lining of the anal canal or lower rectum. It often occurs when a person passes a large stool, is experiencing constipation or diarrhea or during childbirth. Fissures cause pain when trying to have a bowel movement thereafter.
Acute anal fissures will usually heal on their own within a few days or weeks when take proper home remedy steps. These include eating fruits, vegetables and fibrous foods and drinking fluids to help prevent constipation or hard stools, taking sitz baths to soothe torn tissue or using a nonprescription cream to help heal torn tissue.
Fissures that don’t heal within two to three months may require prescription medication or surgery (lateral internal sphincterotomy) to relax the spasm that is causing the fissure.