Discomfort such as abdominal pain and bloating may occur after colonoscopy due to the accumulation of air in the large intestine, which usually disappears within an hour after gentle rubbing of the abdomen to help ventilate the air. If abdominal distension is obvious, you should tell the doctor or nurse in time so that appropriate treatment can be done. After the examination, you may eat a normal meal or eat according to medical advice. During colonoscopy (e.g. polyp removal, EMR, ESD, etc.), hospitalization is usually required. The first stool after treatment may contain a small amount of blood or be dark, which is normal. If there is blood in several subsequent stools and there is a lot of bleeding, it should be reported to the medical staff for early identification of complications such as perforation and bleeding, and further treatment should be done accordingly. After treatment, rest in bed for 1 day, no strenuous exercise and no bathing for 3 days. Diet should be carried out according to medical advice, generally the first day to fast to receive intravenous fluids, after the second day gradually can drink water, into the liquid food, the fourth day can enter the general food, can be discharged. In addition, it should be noted that an adult should accompany the patient for the first 3 hours after the consultation to ensure a smooth awakening process; no alcohol should be consumed within 12 hours after the consultation because alcohol will enhance the effect of anesthetic drugs; it is better not to do work requiring actuarial and logical analysis or sign important documents within 24 hours after the consultation; no driving motor vehicles, mechanical operations, working at height and other dangerous activities within 24 hours after the consultation. You should not drive motor vehicles, operate machinery, work at height or engage in other dangerous work for 24 hours after the consultation to prevent accidents.