could it be?!?!?!?!? Today I notice a large(prob at least 3in in diameter) painful lump under the skin located on the inside of my left arm just above the elbow, never really noticed it before..i have not had any trauma, the area does not appear to be bruised or swollen and it seems as if i can move it back and forth...I am concerned and of course in panic mode. Can someone PLEASE give me an idea of what this could be to ease my mind until i can see my M.D? oh and by the way I also experienced a very sharp pain in my left chest today it was gone as quickly as it was gone.. Not sure if this could be related?????