I have a problem. My middlefinger from my right hand (plucking hand) seems to be under constant tension. It builds up, when I bend my finger, it gives a little snap, after that, the tension is gone for a while, but it returns after a couple of minutes. Snap again etc etc etc. I've also noticed that the finger is a bit swollen, compared to my other middlefinger. I didn't injure it, it hasn't been bruised or something like that. I haven't changed much of my playing habbits, although I've been playing Teen Town a lot, and I've been practising my string skipping at higher speeds.. Any thoughts?