The difference between a high anal fistula and a low anal fistula is mainly due to the location of the fistula. If the location of the fistula is above the deep end of the internal sphincter, it is called a high anal fistula. If the location of the fistula is all below the deep inner anal sphincter, it is called low anal fistula, the location of the fistula will determine the difference between the surgical methods, as follows: 1. low anal fistula: low anal fistula because the sphincter involved is less, when doing surgery will do low anal fistula resection, such as the inner and outer mouth of the fistula together with the fistula, will be removed more thoroughly, because the destruction of the sphincter The company’s main business is to provide a wide range of products and services to the public.