An anal fissure is a tear or cracks in the lining of the anal canal. It can be caused by a variety of factors, including constipation, straining during bowel movements, and trauma to the anal area. The symptoms of an anal fissure can include pain or discomfort during bowel movements, itching or burning around the anus, bleeding during bowel movements, and a small tear or crack in the skin around the anus. The treatment for an anal fissure typically involves lifestyle changes and medication. Surgery is usually the last option of treatment.