Anal Stenosis

What is Anal Stenosis?

When a tubular organ or blood vessel becomes excessively narrow such that it can no longer perform as nature intended, it is a condition referred to by physicians as stenosis. Anal stenosis, also known as an anal stricture, is the narrowing of the anal canal, located just before the anal sphincter.

What causes Anal Stenosis?

Anal stenosis can be the result of many things, such as:

-> complications resulting from a surgical procedure

-> overuse of laxatives

-> A severe blood infection (sepsis) that compromises organs in the body

-> loss of blood to a particular area of the body

-> AIDS and venereal diseases

-> An infection caused by the amoeba entamoeba histolytica

-> Inflammatory bowel disease (IBD), a disorder or inflammation of the colon and small intestine

There is a condition known as Anal Crohn’s disease that mimics the symptoms of anal stenosis. Crohn’s disease is an inflammation that can restrict the anal canal.


Symptoms can vary depending on the severity of the stenosis. They may include:

-> Constipation.

-> Painful bowel movements

-> Stools that are difficult to expel, are narrow, and break apart like pellets.

-> Evidence of bright red blood in the toilet (rectal bleeding)

Treatment of Anal stenosis

Fortunately, preventing the condition from even occurring is the best treatment. But that is not always an option, especially if you must undergo surgery.

Some common preventative measures are:

fiber supplements; more fiber in your diet naturally softens stools, allowing them to pass more easily.

stool softeners or emollient laxatives, which add moisture to the stool.

sphincterotomy, a procedure in which the anal sphincter muscle is cut to open the anal canal.

Surgical procedures to Alleviate Anal Stenosis

The procedure that is performed to relieve anal stenosis is called an anoplasty. There are many variations of this procedure, and one is selected depending on the size and structure of the stenosis.