Dancers stretch before they dance as do other disciplines. Some of us amateur drummers do not stretch - instead, we sit down, take out our djembes and immediately whack 'em. It's no wonder we have body ailments. To alleviate join pain, I have been taking Colloidal Minerals with sulfphur. What this does for me is eliminate the pain in my shoulders and wrists - but, does nothing for the tendonitis.
Massage works wonders, too.
It's those beautiful, loving, warm hands, gently stroking and plying the muscles and tendons. When I get a chance I will check the herbal. This was just off the top of my head. You have had some great advice from many caring people. My suggestion in addition to theirs would be to find a neuromuscular massage therapist or rolfer to work the hands, wrists, arms and pec muscles.