human
My doctor has suggested that I get a colonoscopy. What's a colonoscopy and why do I need one?
assistant
A colonoscopy is a procedure in which your doctor inserts a flexible tube called an endoscope into the rectum to examine the inside of the colon. The purpose of this test is to check for any abnormalities or signs of cancer. Colonoscopies are often performed when you have symptoms such as abdominal pain, bloating, constipation, diarrhea, fatigue, nausea, vomiting, and weight loss.