About half an hour ago I started getting this bubbling sensation below my right shoulder. It was pretty hard to describe, but I put my hand over it and I could actually feel it throbbing, just like when you put your hand over your heart,only much stronger. After 20 minutes or so it ceased and I got the same feeling in my thigh for a few seconds before it continued in my back. I was pretty creeped out by this and after 15 minutes on google I couldn't find an explanation. It didn't hurt, but I wasn't sure where to post this.