Whether colonoscopy needs general anesthesia needs to be judged according to the type of colonoscopy to do, general general colonoscopy does not need general anesthesia, painless colonoscopy needs general anesthesia. Ordinary colonoscopy is no anesthesia or local anesthesia in the anus, the entire examination process is completed in the awake. Patients generally take the side lying position, from the anus into the mirror examination, usually produces a certain amount of pain and discomfort, is more suitable for patients with a higher degree of pain tolerance. Painless colonoscopy is suitable for patients who are intolerant to pain, and the examination is the same as ordinary colonoscopy, which requires anal entry, insertion of the endoscope into the anus, and the lens into the ileum, and if necessary, into the end of the ileum for observation. Generally, it is necessary to give intravenous drip short-acting anesthesia drugs, so that the patient is in a coma state, so that the patient to maintain emotional stability, reduce the phenomenon of fear and discomfort, so that the patient can be in the process of completing the examination in the process of sleep, to improve the sense of comfort of the examination, and at the same time, can assist the doctor to complete the colonoscopy examination smoothly. To sum up, whether colonoscopy requires general anesthesia depends on whether the patient does ordinary colonoscopy or painless colonoscopy, which can be chosen according to one’s own situation, and it is recommended to consult with the doctor, and the specific situation is subject to the doctor’s advice.