Perianal abscess is a common acute infectious disease in proctology. When a perianal abscess occurs, the patient generally experiences severe pain in the anal area accompanied by local skin redness, increased skin temperature, and even systemic fever and fatigue symptoms due to the local abscess. During an outbreak of a perianal abscess, the abscess cavity or pus encapsulation can generally be clearly seen under perianal color ultrasound, and it is necessary to promptly carry out perianal abscess incision and drainage surgery, as well as further one-time radical surgery for the perianal abscess. If not treated actively, a perianal abscess might rupture and likely form an anal fistula, the treatment of which is also primarily surgical.