Certain cardiovascular and cerebrovascular diseases may be induced during colonoscopy in 80-year-olds, and gastrointestinal bleeding and perforation may also occur. Colonoscopy is an invasive examination, and the elderly are in poor physical condition, which may induce certain cardiovascular and cerebrovascular diseases, such as myocardial infarction, cerebral hemorrhage, etc., during the examination process. Moreover, the intestinal mucosa of the elderly is more fragile, so it is easy to have gastrointestinal bleeding or even perforation during the examination. However, with the advancement of medical technology, colonoscopy is generally relatively safe. It should be noted that before performing colonoscopy, the specific condition should be assessed by a professional doctor to determine whether it is suitable for colonoscopy, and it is recommended to follow the advice of the professional doctor.