Perirectal abscesses are much more complex than perianal abscesses and are not clinically common. Keighley (1993) had a comprehensive analysis of 1556 cases of initial perianorectal abscesses by four authors: 43%-84% of perianal abscesses; 16%-30% of abscesses in the sciatic rectal fossa; 0%-21% of intersphincteric abscesses; 0%-6% of submucosal abscesses; 0%-7% of supra-anal tract abscesses. supra-muscular abscess 0%-7%. The sites of recurrent abscesses in 214 cases: 18%-19% for perianal abscesses; 28%-61% for abscesses in the sciatic rectal fossa; 18%-44% for intersphincteric abscesses; 0% for submucosal abscesses; and 2%-10% for abscesses on the levator muscle. Perirectal abscesses are located above the anal raphe and the internal opening can be as high as the intestinal wall. Both the treatment and prognosis are quite different from those of perianal abscesses. Due to their high location, they often require surgery in two stages, i.e., drainage of the abscess in the first stage and removal of the fistula in the second stage by exploring the internal opening. Most of these diseases develop in a process that does not easily subside and does not close for a long time, forming a fistula. Despite this, treatment of perirectal abscesses still requires early incision and drainage, which is an effective way to control infection and reduce complications. Perirectal abscesses commonly include: 1. submucosal abscesses of the rectum; 2. high intermuscular abscesses; 3. abscesses of the pelvic rectal space; 4. abscesses of the posterior rectal space.