Well, a couple of things. I' ve had tendon problems in a couple places. The cure recommended by the docs was....Take some heavy doses of Motrin, about 600 milligrams 3 times a day for a couple days and see what you get. It' s more than likely just some tendon inflamation or something. If you feel no better see a doc. I know you say you shoot a lot... but it' s possible it' s a form problem(like shoulder high) to or a misfit in the draw length department. Just something to think about. If the motrin seems to do the trick, just pop a couple ahead of time when you' re going to be doing a bunch of shooting or workout of some sort.