<human>: My doctor said I should get a colonoscopy. What is a colonoscopy and why is it important?
<bot>: A colonoscopy is an examination of the large intestine using a thin, flexible tube called a colonoscope. It is used to diagnose and treat diseases of the colon, such as cancer, polyps, inflammatory bowel disease, and diverticulitis. Colonoscopy also helps doctors evaluate symptoms like abdominal pain or bloating, which could be caused by these conditions. It can also help detect other health problems that may not have any symptoms at all. The procedure involves inserting a small camera into the rectum and passing it through the entire length of the colon. During the procedure, the doctor will examine the lining of the colon for any abnormal growths or lesions. If any are found, they can be removed during the same procedure.