Originally Posted by jkl626

yes I have armpit pain. It comes from the pec minor and the teres major and minor muscles spasming or being impinged. In my case it may be caused by rib impingement but also just using my arm. It creates aching, weakness and numbness in my arm and pinky. A knowlegdable PT helps and pressure with a ball or a ball on a stick every day and breathing helps too, but mine still happens even with months of pt.