I've only been playing for about 6 months but I have recently developed a pain running from my thumb to my elbow in my right arm (picking thumb and arm). I have backed off to only a few minutes of practice at a time to give my arm rest and started icing it after practice. Is there some mechanical issue with how I might be holding the pick or strumming that could be causing this or is it most likely just over use. I had been practicing 1-2 hours a day. Are there muscles that just strengthen and I just need to get past the muscle building time. Any wisdom to share from the veterans out there?