Diverticulitis is inflammation or infection of small pouches, called diverticula, which develop along the walls of your intestines. The formation of the pouches themselves is a relatively benign condition known as diverticulitis. The pouches can develop anywhere on the digestive tract, but they most commonly form at the end of the descending and sigmoid colons, and they also frequently occur on the first section of the small intestine, although problems are rarely found there. Ageing and heredity are primary factors in the development of diverticulitis, but diet also plays a role. So, eating a lot of low-fibre, refined foods can significantly increase the risk.