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.
The symptoms of an ulcer include:
Burning upper abdominal pain, particularly between meals, early in the morning, or after drinking orange juice, coffee, or alcohol, or taking aspirin; discomfort is usually relieved after taking antacids.
Tarry, black, or bloody stools.
Nausea or vomiting.