The rumbling stomach is due to hyperactive bowel sounds. There are many reasons for hyperactive bowel sounds: firstly, people who are hungry are prone to have hyperactive bowel sounds because there is nothing to digest in the intestines after the food is emptied, and the intestines are involuntarily peristaltic at all times. Secondly, strong intestinal sounds can occur when there is enteritis or dysentery. Third, the early stage of intestinal obstruction, intestinal torsion, and intestinal overturning will also have strong intestinal sounds, and the gas and liquid in the intestine will make a sharp sound when passing through the narrow intestinal canal. Fourth, when there is bleeding in the intestinal canal, there will also be a strong intestinal sound performance. Generally portal hypertension, bleeding esophagogastric fundic varices, and biliary bleeding can be caused.