Before undergoing painless endoscopy, the doctor will explain to the patient some relevant precautions, and will also send the patient a written document called “informed consent”, which must be read and really understand the contents of the document before the examination. Specifically, the following points should be done before, during and after the examination: 1) You should not eat after dinner the day before the examination, and you should not eat or drink on the morning of the examination. 4, the day of the examination should be accompanied by adult relatives and friends, and the active dentures should be removed at the time of the examination. Under the supervision of the anesthesiologist, monitor the heart rate, blood pressure, oxygen saturation and other dynamic indicators to ensure safety during the consultation; 7. An adult escort is required for the first 3 hours after the consultation to ensure the smooth awakening process of anesthesia; 8. No alcohol can be consumed within 12 hours after the consultation, and spicy food is prohibited within 24 hours because alcohol will enhance the effect of anesthetics; 9. 10. Do not drive motor vehicles, operate machinery, work at height and other dangerous work within 24 hours after consultation and treatment to prevent accidents; 11. treatment.