I've been trying to keep the muscle tension out of my finger but after a bend all my fingers get really tight and locked up and it takes a few notes for them to gain there flexibiltiy back how come that happens?
I used to have that problem when i started learning how to tap notes..
i would tap a lick and then my entire arm would hurt like a mofo. and it would go away a minute later..

from my experience, it gets better the more your work on it.. now i dont even feel anything
just from working the muscle hard I think...like the guy said with tapping I think its just that those muscles in your arm arent used to it and as they get stronger the feeling goes away