Many patients are very afraid of colonoscopy, thinking that it is very painful and distended, so they are very nervous. This emotion is understandable, and each patient feels differently about colonoscopy; some patients may tolerate it well and have less common reactions. Because the colonoscopy will be pumped, and the colon has a lot of curvature, such as the junction of the rectosigmoid colon, the spleen, the liver area, etc., these turning places will appear more obvious pain. Therefore, if the patient is intolerant to gas or pain, it may result in the inability to continue with the general colonoscopy. If the patient is very worried and afraid of the colonoscopy, the patient can be advised to have a painless colonoscopy, which is a colonoscopy under general intravenous anesthesia, where the patient has no discomfort and the colonoscopy is performed in a very comfortable situation. If the patient is aware of the possible discomfort of colonoscopy symptoms, psychological preparedness, the doctor in the operation process will also appease the patient’s emotions, cautioning the patient to try to relax, so the colonoscopy is the need to cooperate with the examination, only with the good doctor can better carry out the examination of colonoscopy.