A few months ago I did a gig, and afterwards my right index finger was pretty sore--it felt like I jammed it or something. Ever since then it's gotten worse and then better and then worse/better again, but it's never gone away totally. It's still a little stiff now. I've tried a few things like epsom salt, aleve, playing lighter with my right hand, and taking a few days off from playing, but the stiffness won't go away. Has anyone had a similar injury or know something I can do to fix it?