Diverticulosis refers to the appearance of diverticula, kinds of small bags developed on the lining of the digestive tract. Diverticulosis is common in older people, especially at the end of the colon, called the sigmoid colon. In general, diverticulosis is not responsible for any symptoms, in the absence of complications. Sometimes it can cause diverticulitis when one or more of these small hernias on the lining become inflamed. Diverticular disease is often identified due to its complications or incidentally during a colonoscopy performed in the context of a screening for colorectal cancer. To prevent or slow diverticulosis, a diet rich in fiber is recommended.