Anal fissure definition and facts. What are anal fissures?
An anal fissure is a fishers or tear fishers in the anus the opening through which stool passes out of the body that extends upwards into the anal canal. They affect men and women equally and both the young and the old. Fissures usually cause pain during bowel movements that often is severe.
Anal Fissure Causes & Risk Factors, Frequently Asked Questions
Anal fissure is the most common cause what rectal bleeding in infancy. Anal fissures occur in the specialized tissue that lines the anus and anal canal, called anoderm.
At a line just inside the anus referred to as the anal verge or intersphincteric groove the skin dermis of the inner buttocks changes to anoderm. Unlike anal, anoderm has no hairs, sweat glands, or sebaceous oil glands and contains a larger number of sensory nerves that sense light touch and pain.
The abundance anal nerves explains what anal fissures are so painful.