I was going to say "Take two aspirin and start shooting a BowTech." but I see you're already doing part of it at least. The TomKat has very little hand shock when compared to most bows on the market. I started getting similar pains a couple years ago (at 37). I took some time off shooting and used ibuprofen to keep the swelling down. It's probably just a sign of getting older but you may want to ask a doctor about it, it could be tendonitis or arthritis. An elastic elbow brace may help also. (I have to wear one on my knee for goat hunting now, along with better living through drugs...)