Hi, I've been trying to figure out what's causing my back and groin pain. My first concern was an aneurysm. I went to the doc and did an abdominal ultrasound and that was normal. But, I read about a pulse near the belly button which I notice too. But, the doc said I should because I'm slim or something. Basically, if I lay down I can watch my stomach sort of jump up with each heart beat. Could this possibly be normal?