Re: pulsing abdomen?
If this pain worries you to the point of panic, I would talk to my family physician today, or go to one of the walk-in medical clinics that are open on weekends. They are well trained in finding abdominal aortic aneurysms, by examining your abdomen and feeling for a "pulsatile mass left of the midline". Your pain/problem needs to be checked out by a doctor.
Here is some non-copyrighted info:
Approximately 75 percent of abdominal aortic aneurysms are asymptomatic and are detected during routine physical examination or during an unrelated radiologic or surgical procedure.
Symptoms of abdominal aortic aneurysm may result from expansion or rupture of the aneurysm, pressure on adjacent structures, embolization or thrombosis. The most commonly reported symptom is any type of abdominal, flank or back pain. Pressure on adjacent viscera may result in compression of the bowel.
The abrupt onset of severe, constant pain in the abdomen, flank or back, unrelieved by positional changes, is characteristic of expansion or rupture of the aneurysm. The cause of pain related to expansion of the aneursym is poorly understood but may be related to the stretching of the layers of the aortic wall, putting pressure on adjacent somatic nerves.
B-mode ultrasound is the screening method of choice for asymptomatic abdominal aortic aneurysms. It is available in most hospitals, is relatively inexpensive (about $150 per examination), does not require ionizing radiation, reveals details of the vessel wall and associated atherosclerotic plaques and allows accurate measurement of the aneurysm in both longitudinal and transverse dimensions.