If these pouches become infected or inflamed, this will, in turn, lead to diverticulitis, with symptoms that can include cramps, gas, bloating, upset stomach, and alternating periods of diarrhea and constipation. About half of all Americans age 60 to 80 years, and almost everyone over the age of 80, have diverticulosis, probably because the intestinal lining gradually weakens with age. In most cases, this disease is dormant, meaning that it is not active and the pockets do not become infected. The main cause of diverticulosis appears to be a low fiber diet. The average person in the United States consumes 13 to 15 grams of fiber daily.
Insufficient fiber can be detrimental by increasing pressure on the colon.
This may cause weak spots in the colon, allowing the tissue to bulge out and become diverticula. A high fiber diet can help relieve symptoms for most people with diverticulosis. Registered dietitians and the Committee on Dietary Allowances recommend 20 to 35 grams of fiber each day. Also, keep your stools soft by drinking lots of water, and don't strain when moving your bowels. This should help prevent diverticula from developing as well.