Perianal abscess is an acute purulent infection that occurs around the anorectum, and its source of infection is the tissue called anal sinus at the junction of the anal canal and rectum in the anus, and the infecting bacteria is mainly Escherichia coli in feces. This is because the primary site of perianal abscess is in the rectum, and the rectum is a polluted environment, which leads to the continuous entry of pathogenic bacteria and feces into the infected pus cavity from the infected anal sinus site, which is like a cesspool, the inlet is open for a long time, and there is continuous inflow of sewage, and the inlet is not closed, and the sewage in the pool cannot disappear. It is impossible for the sewage to disappear until the inlet is closed. Once a perianal abscess is diagnosed, early surgery should be performed to prevent the infection from spreading and aggravating the difficulty of surgery, while the damage of surgery will inevitably be aggravated when the infection is expanded; moreover, if a perianal abscess is not treated in time, it can lead to bacteremia and sepsis, endangering the patient’s life. It is difficult to avoid another attack after stopping the medication.