What is Anal Fistula? An anal fistula is an abnormal tract between skin and the anus. Stool enters this tract and causes infection leading to discharge of pus from the wound near the anus. What are low and high Anal Fistulas? Fistulas are called low and high according to the position of the internal anal… Continue reading VAAFT- Modern Treatment of Anal Fistula- No wound, no dressing, least pain