Treatment Choice - Treatment Choice | Compare Prices | Find Hospital | Your doctor may recommend colonoscopy if you have developed changes to your bowel habits, if you are experiencing bleeding from your anus or if you have blood in your stool.<br/>A colonoscopy may be carried out as a screening test for bowel cancer. It can also reveal the presence of polyps, which are non-cancerous growths on the lining of the bowel, and other problems in the bowel lining.<br/>Colonoscopy involves inserting a colonoscope – a long fibreoptic tube with a lens or camera on the end – through the anus. Your doctor can then examine the lining of the rectum (the area of colon near your anus) and the entire colon on a screen.