I have pain in my left upper arm, in the bicep area, but more to the outside of the arm. There seems to be a lump between the deltoid and elbow, about half way down my arm. I have what feels like tennis elbow as well, but there's numbness in my last 3 fingers on that side and sometimes the pain is pretty severe, especially after working a while. I have had rotator cuff surgery along with a reattachment of the bicep tendon about 6 years ago on that side.