A doctor orders a colonoscopy as an investigative measure to determine if any one of a numerous number of issues might be occurring which include: colon cancer, inflammatory bowel diseases, abdominal pains, rectal bleeding, diarrhea and other intestinal issues.
The main takeaway is that a colonoscopy can actually save your life and highly recommended to have regular checkups with a gastroenterologist to determine when you should have your next colonoscopy.