Inflammation of the lining of the intestinal wall causes Inflammatory Bowel Diseases (IBD) such as diverticulitis, ulcerative colitis, and Crohn’s disease. These diseases are painful and can cause acute diarrhea, fever, fatigue, reduced appetite, weight loss, and blood in the stools. To soothe the lining of the intestines, doctors often recommend following a low residue diet or a low fiber diet.
When on a low-fiber diet, it's a good rule to stick to refined, white grains. Things like rice crackers, Cheerios, Rice Krispies, oatmeal, and white breads and pastas are the best options. Oatmeal contains fiber, but it's the soluble kind, meaning it absorbs water and passes through the digestive tract more slowly than the insoluble type you're trying to avoid. Look for grains with less than one-half gram of fiber per serving and avoid whole grains of all kinds.