You're constipated. Constipation can occur when not eating enough fiber-rich whole grains, fruits, and veggies, which stimulate digestion. Adults need between 25 and 30 grams of fiber a day, says Dr. Lee. Best foods: High-fiber whole grain breads, nuts, beans, prunes, oatmeal, flaxseed, broccoli, pears, and apples.
A stomach rumble, also known as a bowel sound or peristaltic sound, is a rumbling, growling or gurgling noise produced by movement of the contents of the gastro-intestinal tract as they are propelled through the small intestine by a series of muscle contractions called peristalsis.
The reasons for the various stomach and bowel noises are due to 1  : movement of food and chyme through the alimentary tract as the muscle contractions of the gastrointestinal wall pushes it through the gut as well as churning and breaking it down to aid with digestion.