To do colonoscopy choose painless or ordinary need to choose according to the patient’s specific situation, pain tolerance can choose ordinary colonoscopy, pain sensitive can choose painless colonoscopy. If the patient’s pain tolerance level is relatively strong, the physical quality is good, can cooperate with the examination, you can choose ordinary colonoscopy. However, it should be noted that painless colonoscopy compared to ordinary colonoscopy, the operation of the anesthesia process, so there is a risk of anesthesia. If the patient is allergic to anesthesia, he/she should also choose normal colonoscopy. Painless colonoscopy is the use of anesthesia, so that the patient sleep to complete the examination, compared with the ordinary colonoscopy is more comfortable and less painful. If the patient is sensitive to pain or has a history of open surgery, has adhesions in the intestines or is young or has mental illness that makes it difficult to cooperate with an ordinary colonoscopy, he or she can choose painless colonoscopy. If patients need to do painless colonoscopy, they also need to improve the electrocardiogram, chest CT and other tests, combined with the patient’s other diseases to determine whether anesthesia can be carried out to safely perform painless colonoscopy. It is recommended to go to the hospital in time, consult the relevant doctors, and choose the appropriate way to perform colonoscopy under the judgment of doctors.