What Is a Fistula?
For example, fistulas can occur between the rectum and the vagina or the intestine and the skin. There are several causes of fistulas, including abscesses, surgery, and Crohn’s disease. Symptoms depend on the location of the fistula. Verywell / Nusha Ashjaee Creating an AV fistula increases blood flow into a vein, providing good access to blood vessels. What Causes a Fistula? Fistulas commonly form because of anabscess, a pocket of pus in the body....