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. Most anal fissures heal with home treatment after a few days or weeks. These are called short-term acute anal fissures.

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.

Back to Health A to Z. An anal fissure is a tear or open sore ulcer that develops in the lining of the large intestine, near the anus. Do not let embarrassment stop you seeking help. Anal fissures are a common problem GPs are used to dealing with. They can also tell you about self-help measures and treatments that can relieve your symptoms and reduce the risk of fissures coming back.

Your doctor will likely ask about your medical history and perform a physical exam, including a gentle inspection of the anal region. Often the tear is visible. Usually this exam is all that's needed to diagnose an anal fissure. An acute anal fissure looks like a fresh tear, somewhat like a paper cut.