The left side of the stomach throbbing is related to acute enteritis, intestinal spasm, and abdominal aortic throbbing. In acute enteritis, there will be inflammation on the intestinal mucosa during the attack, and due to the stimulation of inflammation so the intestinal wall will spasm and contraction, and at the same time the function is impaired, because of the spasm and contraction of the intestinal wall, so the phenomenon of jumping on the stomach will appear, and some people are mainly jumping on the left side. The causes of intestinal spasm are common, such as the intake of stimulating food, cold and chill in the abdomen, etc. These factors will lead to a stress response in the intestine, so that paroxysmal convulsions will occur, accompanied by the performance of tummy fluttering. The human abdominal aorta passes through the middle left part of the abdomen, and the abdominal aorta has a certain beating nature. Some people have a thin body and relatively thin subcutaneous fat, so the beating will be more obvious. The abdominal aorta beats with a certain regularity and is not accompanied by abdominal pain, especially when lying on the back.