Anal distension does not have the best effect of the examination, need to choose the examination method according to the patient’s performance symptoms, need to carry out specific analysis. Many clinical diseases can cause anal distension symptoms, such as female pelvic inflammatory disease, pelvic congestion, will lead to abdominal pain and anal distension, at this time the need for abdominal ultrasound; hemorrhoids may also lead to anal distension, at this time the need for rectal diagnosis, anoscopy and so on. Therefore, there is no best examination for anal distension, and it is necessary to combine the main clinical symptoms of the patient and choose the suitable examination method. The above examination should be carried out under the operation of professional doctors in regular hospitals to avoid other adverse effects on the body. It is recommended that people with anal distension should follow the doctor’s instructions for relevant examinations according to their personal specific conditions.