Doing a proctoscopy usually requires bowel cleansing, and you need to follow the doctor’s instructions to prepare for the test. Patients need to clean the intestines before doing proctoscopy, which can facilitate the doctor’s in-depth understanding of the condition, if there is food residue retained in the gastrointestinal tract, it may affect the results of the examination. If the rectum is full of feces, it may affect the examination field of view due to fecal water residue, which may easily lead to incomplete examination. Before doing the colonoscopy, you need to clean the bowel, and follow the doctor’s instructions to fast and keep fasting, when there is constipation or the feces in the rectum can not be voluntarily discharged, you can promote the discharge of feces by means of bowel cleansing. Before doing the proctoscopy, patients should do the preparatory matters under the guidance of the doctor, maintain a stable mood, and avoid eating spicy and irritating food. If any discomfort occurs after the colonoscopy, please contact your doctor in time to avoid adverse consequences.