Tummy movements are caused by indigestion, intestinal spasms, and in some cases, by abdominal aortic boiling. Digestion of food is affected when the gastrointestinal function is low and indigestion can occur. When dyspepsia occurs, food residues can be irritating to the digestive system, and some people will have hyperactive bowel movements, where they can see their stomach moving. The abdominal aorta passes through the abdomen of the human body, and in some people there is relatively little fat in the abdomen, and the abdominal aorta is clearly visible when it is pulsating. The abdominal aorta beats relatively slightly, while beating at the same frequency as the heart, and is more likely to appear especially in the body of thin people.