For the past 2-3 months I have slowly been feeling some sort of pain in my left armpit while doing any upper body exercises. For the last week it’s been much worse, it hurts to bench or even to do pushups, chinups are excruciating. It doesn’t feel connected to PEC although it may be possible. Feels very deep in the middle of the arm pit.
Anyone have any idea what I may have pulled / inflamed?