Some people are more prone to developing anal fissures, particularly those with a tight anal sphincter. A hard, dry bowel movement or loose, frequent bowel movements can lead to anal fissures.

Both conditions can cause discomfort and bleeding.Īnal fissures are usually the result of trauma to the inner lining of the anus from a bowel movement or from other stretching of the anal canal. The American Society of Colon and Rectal Surgeons defines an anal fissure as “a small rip or tear in the lining of the anal canal.” The condition is common but often confused with hemorrhoids, which are swollen veins in the lowest part of the rectum and skin around the anus. Many doctors also prescribe diltiazem-ointment for anal fissures, an uncomfortable condition suffered most often by infants and middle-aged adults. Doctors commonly prescribe diltiazem to treat high blood pressure and to control the type of chest pain known as angina.