An anal fissure is a tear in the lining of your anus or anal canal, the lowest part of your intestinal tract. It can make bowel movements very painful, and can even cause pain that lasts for hours after you've gone to the bathroom. You may even try to avoid the bathroom to prevent the pain.
An anal fissure is usually a short-term (or acute) problem, with symptoms that last 6 weeks or less. It's considered chronic when symptoms last for more than 6 weeks. Chronic anal fissures may be harder to treat and may be a symptom of another condition, such as Crohn's disease or ulcerative colitis.
Chronic constipation -- when you can’t poop -- is a common digestive problem. You might have considered over-the-counter laxatives to “get things moving,” but you can do plenty to manage chronic constipation without taking medicine. One of the simplest ways is to drink plenty of fluids every day, eat dietary fiber, and exercise.