Colonoscopy requires the insertion of the colonoscope through the anus to the ileocecal region, which many people find painful, but it is actually not as painful as one might think. With the development of medical technology, colonoscopy can be divided into two types: general type and painless type. The general type of colonoscopy does not require anesthesia, there will be a slight abdominal distension, but most people can tolerate, but for the thin body type, especially for patients with a history of abdominal or pelvic surgery, the abdominal distension will be more serious; while the painless type of general anesthesia by anesthesiologists, so that patients in a deep sleep state to complete the colonoscopy, the pain and discomfort of the examination process, the patient does not know. Colonoscopy generally takes 10-30 minutes, but because the intestinal tract of each person is different, the examination will inevitably cause different degrees of abdominal discomfort and even abdominal pain. If we encounter some patients with complex intestinal tract alignment (such as those with intestinal adhesions caused by abdominal pelvic surgery), the difficulty of endoscopy will be greatly increased, the operation time will be prolonged, and the patient’s abdominal discomfort will be more obvious. In addition, in all colonoscopies, the preliminary preparation and after the examination may cause patients to feel a little discomfort. For example, fasting for a specified period of time before the examination and taking oral laxatives the night before the examination to cleanse the intestines may interfere with the previous day’s sleep and cause some pain. The condition may be followed by drinking some sugar saline to prevent deficiency, consuming non-stimulating food and avoiding strenuous exercise to promote recovery.