The sigmoid colon is the last section of the bowel ... According to the National Institute of Diabetes and Digestive and Kidney Diseases, you may be at higher risk for ulcerative colitis ...

In diverticulosis, small pouches develop and bulge out through weak spots in the walls of the colon, typically in the part of the colon called the sigmoid colon on the left side of the abdomen.

They will insert the sigmoidoscope through the rectum and pass it into your sigmoid colon. The doctor will use a small amount of air to expand the colon to see the colon walls. You may feel mild ...