You may also try stretching your forearms on a regular basis:
http://www.shelterpub.com/_fitness/_...clinic/hwf.pdf
I would also suggest you take the carpal tunnel test just to rule it out. It can be found here:
Wrist Rollers
It could also be because one part of your forearm is stronger than another. If the flexors are a lot stronger than the extensors (or visa versa) it can cause problems. So using a wrist roller or some other form of training may help.
GL...