An anal fistula is an abnormal channel connecting the inside of the anal canal with the skin around the anus.
In most cases, it is the result of an abscess that develops for unknown reasons in the wall of the anus and does not heal properly. An anal fistula may also sometimes develop as a result of an intestinal disorder such as Crohn’s disease , ulcerative colitis , or colon cancer.
Symptoms of an anal fistula may include a discharge of pus onto the skin around the anus; passing blood or pus in the feces; irritation, swelling, redness, and constant, throbbing pain around the anus; and, in some cases, fever and fecal incontinence.
A fistula rarely heals by itself and usually requires treatment with surgery.

Othere related diseases

JAUNDICE
Jaundice is yellow discoloration of the whites of the eyes and skin, and is the chief sign of many disorders of the liver and biliary system. It is caused by th...

LACTOSE INTOLERANCE
In lactose intolerance, the body cannot digest lactose, a natural sugar in milk and dairy products. The condition usually appears in adolescence or adulthood an...

LEUKOPLAKIA
In leukoplakia, there are small, thickened, white patches in the mouth, usually on the lining of the mouth or tongue, but sometimes on the gums or floor of the ...

LIVER CANCER
Most cancerous liver tumors are due to a cancer having spread from another part of the body (metastases), most commonly from a cancer in the colon (bowel), stom...

LIVER FAILURE
In liver failure, normal functioning of the liver is severely impaired. It may occur suddenly (acute liver failure), for example, as a result of acute hepatitis...

MALABSORPTION
Malabsorption is a general term for impaired absorption of nutrients by the small intestine. It may be caused by many conditions, including cystic fibrosis , ce...

MECKELS DIVERTICULUM
Meckel’s diverticulum is a small, hollow, wide-mouthed pouch that protrudes from the last part of the small intestine. The pouch is present at birth.
It ...

MOUTH ULCER
Also known as aphthous ulcers or canker sores, mouth ulcers are painful open sores inside the mouth. The exact cause of mouth ulcers is unknown, though a combin...