Anal Fissure (cont.)
Thomas P. Sokol, MD, FACS, FASCRS
Thomas P. Sokol, MD received his medical degree from the University of Health Sciences/The Chicago Medical School in 1980. He went on to his general surgical residency at Harbor/UCLA Medical Center and then to the Carle Clinic/ University of Illinois for Fellowship Training in Colon and Rectal Surgery.
In this Article
- Anal fissures facts
- What are anal fissures?
- What causes anal fissures?
- What are the symptoms of anal fissures?
- How are anal fissures diagnosed and evaluated?
- How are anal fissures treated?
- Find a local Gastroenterologist in your town
What are anal fissures?
An anal fissure is a cut or tear occurring in the anus (the opening through which stool passes out of the body) that extends upwards into the anal canal. Fissures are a common condition of the anus and anal canal and are responsible for 6% to 15% of the visits to a colon and rectal (colorectal) surgeon. 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 is the most common cause of 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 skin, anoderm has no hairs, sweat glands, or sebaceous (oil) glands and contains a larger number of somatic sensory nerves that sense light touch and pain. (The abundance of nerves explains why anal fissures are so painful.) The hairless, gland-less, extremely sensitive anoderm continues for the entire length of the anal canal until it meets the demarcating line for the rectum, called the dentate line. (The rectum is the distal 15 cm of the colon that lies just above the anus and just below the sigmoid colon.)
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