An anal fissure is a tear or cut that extends into the anal canal. While many fissures measure less than 1 centimeter, the area is sensitive, and any tear can be painful. About 10 percent of people are affected, often without knowing the cause. Learn more about anal fissures, including prevention and treatment, here.
Ulcerative colitis is an inflammatory bowel disease that can vary in severity. If people leave it untreated, symptoms can gradually get worse and may become more difficult to treat in the future. Treatment also reduces the risk of serious complications. Learn more here.