The steps of anal ultrasound examination include pre-examination preparations and the examination process, which involves placing the anal ultrasound probe into the anus and observing it after the examination. Before the examination, the examinee should be informed of the precautions and sign the informed consent, explaining that there may be discomfort during the examination, and informing the examinee to cooperate with the examination. During the examination, the ultrasound probe is wrapped and lubricant is also applied, the examinee is instructed to relax, the ultrasound probe slowly enters the anal canal for examination, and what is seen is recorded. After the end of the examination, observe for 3~5 minutes, no obvious abnormality is seen, the examiner can leave. The test can examine the anal canal, rectum and pelvic organs, and can also be used to examine the uterus and adnexa in women and the prostate gland in men. If an abnormality is found during the examination, it is necessary to further improve the relevant examinations and draw conclusions based on the patient’s medical history and clinical manifestations. After clarification, active treatment.