A heartbeat on the stomach is normal in people who are young and thin, but in older people it should be alerted to an abdominal aortic aneurysm. Some children are thin and have less abdominal fat, and the abdominal aorta is located in the abdomen, so when the abdominal aorta is beating, a heartbeat can be felt on the body, which is not related to the heartbeat, nor is it related to disease, and will disappear after the body becomes stronger in adulthood. For people with normal body fat thickness, especially those who are older, they need to be alert to abdominal aortic aneurysm. Abdominal aortic aneurysm is a disease caused by a change in the wall of the artery, which is rich in blood flow around it and causes accelerated beating especially when there is an increase in blood pressure. The diagnosis can be made by ultrasound of the abdominal aorta, and those diagnosed with abdominal aortic aneurysm can be treated with vascular replacement surgery.