The anal canal is a short tube surrounded by muscle at the end of your rectum. The rectum is the bottom section of your colon large intestine. An anal fissure also called fissure-in-ano is a small rip or tear in the lining of the anal canal. Fissures are common, but are often confused with other anal conditions, such as hemorrhoids. Fissures are usually caused by trauma to the inner lining of the anus from a bowel movement or other stretching of the anal canal. This can be due to a hard, dry bowel movement or loose, frequent bowel movements.
Back to Anal fissure. Like other small cuts or tears to the skin, an anal fissure will often heal by itself within a few weeks. Most anal fissures will heal with treatment, although they can happen again easily, particularly if you don't follow the self-help advice outlined below. There are a number of different medicines your GP may recommend to help reduce your symptoms and allow your anal fissure to heal. Adults with an anal fissure will usually be prescribed bulk-forming laxative tablets or granules. These work by helping your poo retain fluid, making it softer and less likely to dry out.
Learn about our expanded patient care options for your health care needs. Fissures result from the stretching of your anal mucosa beyond its normal capacity. This often happens when stools are hard due to constipation. Once the tear happens, it leads to repeated injury. The exposed internal sphincter muscle beneath the tear goes into spasm.
Jump to content. An anal fissure is a tear in the lining of the lower rectum anal canal that causes pain during bowel movements. Anal fissures don't lead to more serious problems.