Originally Posted by
Polaris OBark
Get it checked by a doctor. It could be nothing. It could be coronary blockage. The internet doesn't know.
This.
About 35 yrs ago I went to the Dr. About my shoulder as it was killing me, could barely sit still for x-rays. Turns out that it was a neck issue and the first indicator of stenosis and degenerative discs. Hope that's not your issue but message is that it could be something other than your shoulder so bst to get it checked. Good luck?