What is the difference between high anal fistula and low anal fistula

The fistula of low anal fistula is located below the deep part of external anal sphincter and can be divided into low simple anal fistula and low complex anal fistula. The fistula of low simple anal fistula has only one fistula, and the fistula of low complex anal fistula has multiple fistulas and fistulas. The fistula of high anal fistula runs above the deep part of external anal sphincter and can be divided into high simple anal fistula and high complex anal fistula. The fistula of high simple anal fistula has only one fistula, and the fistula of high complex anal fistula has multiple fistulas and fistulas. Therefore, the difference between low anal fistula and high anal fistula lies in mainly looking at the position of fistula. If it is below the deep part of external anal sphincter, it is low anal fistula. If it is above the deep part of external anal sphincter, it is high anal fistula. This classification method is more commonly used clinically. Specifically, it should be diagnosed by anorectal department.