The cost of colonoscopy is relatively inexpensive,$350 for general colonoscopy in usual cases and$800-1000 for painless colonoscopy with anesthesia. Before doing the colonoscopy, the patient should have blood tests to exclude infectious diseases, such as hepatitis A, hepatitis B, hepatitis C, AIDS and syphilis, as well as intestinal cleansing, which requires oral laxatives, including mannitol, polyethylene glycol electrolytes, etc. The cost of laxatives 100-200 RMB. After colonoscopy, some patients will show abdominal distension because they have to pump during the colonoscopy. After the colonoscopy, exhausting and rubbing the stomach can be relieved in 2-3 hours.