A tear within the lining of the anus or anal canal is known as an anal fissure. The anal canal is an opening from which stool passes out of the body, but due to the fissure, it can be painful and may bleed.
Anal fissures can happen to anyone at any age. Yet, the chances of getting anal fissures decrease as people get older. Also, people who had fissures in the past are very likely to get them in the future.