Horseshoe-shaped perianal abscess, is more serious. Horseshoe-shaped perianal abscess is complicated by surgical operation, large wound trauma and slow recovery due to the large scope and high location of the infection. The scope of infection involves the sciatico-rectal space on both sides of the perianal area, which is difficult to operate and prone to recurrence, and the operation is easy to damage the anal sphincter, causing anal incontinence and affecting the function of defecation. Horseshoe-shaped perianal abscess, a compound infection of multiple interstitial spaces, is easy to form an anal fistula, and prolonged delay can lead to rectovaginal fistula, rectourethral fistula, endangering the surrounding organs. Poisoning symptoms caused by infection, if not treated in time can eventually lead to systemic sepsis and septicemia; or treatment is not complete there will be the possibility of malignant changes, so it is more serious. If the patient has a horseshoe-shaped perianal abscess, it is recommended to consult a doctor in a timely manner, after a clear diagnosis, actively cooperate with the doctor for treatment to prevent the expansion of the scope of the lesion.