It's been going on for a couple of days. Details are
Right arm, not really the pit but where the arm joins the body towards the front, just outside the pit.
It pulses, kind of. It's a weird pushing feeling, quite deep in and painful but not in a way that makes you shriek. It's a kind of deep dead pain, like it's really deep inside where maybe there aren't so many pain receptors? I had an angiogram recently, they went in through my wrist and I got a 'fluttering' feeling when the tube was pushing through there, in pretty well exactly this place.( My arteries are fine, btw.)
I'm seeing a cardiac surgeon tomorrow preparatory to my upcoming aortic valve replacement. I'll mention it to him, but I'd quite like to know if anyone has any idea what it might be. It's periodic, not constant.