Dr. Saggu
Anal fistula is the medical term for a small tunnel that forms between the skin around the anus and the muscle opening at the end of the intestine or digestive tract. It results from an infection around the anus that causes an abscess (pus) to form in the surrounding tissue.
Most anal fistulas develop into abscesses that spontaneously or surgically break open from the skin near the anus. As the pus drains, it leaves a small channel behind.
Anal fistula can cause some unpleasant symptoms such as skin irritation and discomfort. They are usually treated with fistula surgery in Delhi.
Following are some of the common symptoms of anal fistula:
Irritation of the skin around or near the anus
Persistent throbbing pain that gets worse when sitting, defecating, coughing or moving.
Foul-smelling discharge from the anus
Discharge of pus during bowel movements
Fever (high temperature) with swelling and redness in and around the anus, and abscesses.

In some cases it is difficult to control bowel movements.
You may also notice:
Bleeding during bowel movements
Pain while urinating or having a bowel movement
A foul-smelling liquid is secreted from the anus.
The tip of the fistula can be seen as a hole near the skin around the anus, but it is difficult to see on its own.
If you have recently noticed or experienced any of these signs or symptoms, you should seek immediate medical attention. Consult an experienced professional for the best treatment to cure this condition.
The different types of anal fistula are classified according to their location, for example:
Intersphincter fistula: In this type, the passage begins in the space between the external and internal sphincter muscles and opens near the anus.
Transsphincteric fistula: The course begins between the external and internal muscles of the sphincter or in the space behind the anus. Further, it crosses the external sphincter and opens forward to the anus.
Fistula: In this type, the tract begins in the space between the internal and external sphincter muscles. It then turns upward and takes a position just above the puborectalis muscle, crossing this muscle. It also passes between the levator ani muscle and the puborectalis muscle, and then opens outside the anus.
Extrasphincteric fistula: In this type, the passage begins in the sigmoid colon or rectum and then extends downward. It passes through the levator ani muscle and opens a few inches near the anus. READ MORE