A colonoscopy is a medical procedure used to examine the lining of the colon and ****. It is commonly done to screen for colon cancer or to investigate symptoms such as rectal bleeding, changes in bowel habits, or abdominal pain. During a colonoscopy, a long, flexible tube with a camera on the end is inserted into the **** and guided through the colon. The doctor can then examine the lining of the colon for any abnormalities, take tissue samples for biopsy, or remove polyps if necessary. The procedure is usually done under sedation to minimize discomfort for the patient.
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