Abscess around the anus is a surgical procedure in anorectology and can be diagnosed based on the following points: first, diagnosis can generally be made through the patient’s clinical symptoms, and patients suffering from perianal abscess will have a lump in the anal area and local redness and swelling; second, the lump in the patient’s anal area will be painful and fluctuating when touched, and the boundaries of the lump are not clear; third, diagnosis can also be made through ancillary examinations, such as routine blood tests, and if the blood level is elevated, it is an infection. Thirdly, the diagnosis can also be made through auxiliary examinations, such as routine blood sampling, and if the blood picture is elevated, it is a case of infection, usually an abscess around the anus, and also through ultrasound around the anus, which can directly check the size and scope of the anal abscess. In summary, the above methods can be used as a basis for the diagnosis of perianal abscess.