What is the sign of left lower abdomen pain between pelvic and rib in men? Why Do I Feel Movement in My Lower Abdomen: Causes and Treatment Have you ever noticed a pulsing in your belly when lying down? Its often normal, but if it feels unusually strong or comes with new pain, it could point to an abdominal aortic aneurysm, especially in Is Feeling a Pulsation in the Abdomen Abnormal? Vinmec Lower Abdominal Pain: Causes, Symptoms & Emergency Signs