There is no such thing as a colonoscopy that can be performed for several years at a time, because colonoscopy is a means of examination, and this examination technique is only used to diagnose the disease when it occurs. Although it is possible to perform related surgical operations under colonoscopy, such as taking specimens or performing simple treatments, the specific treatment effect is determined by the disease condition. For minor intestinal diseases, such as ulcers, if the treatment is relatively effective, the disease may not recur for life. However, in the case of neoplastic diseases, they may remain for a long time and cause discomfort relatively frequently. Therefore, the prognosis should be judged according to the condition, not the means of examination and treatment.