The first symptom of perianal abscess is a painful mass around the anus, which is hard in texture and gradually increases in size and softness, with increased pain, and may be accompanied by fever and other systemic symptoms. If the abscess is not treated in time, it may break down and flow pus. When an anal fistula is formed, one or several small nodules often appear in the paranal area, with strips leading into the anorectum, and there is often purulent discharge or blood flowing from the nodules, which may be accompanied by pain.