Sometimes when I play, I get pain in my hands.. It usually happens when I play lots of consecutive octaves chords that have multiple notes in between fast. I have a small hand, could it just be that I'm stretching it so much that it causes pain? Just curious as to if anyone else has had this problem, what could possibly be going wrong with my playing, or if anyone knew any warm-ups that would help? I'm pretty young so I don't think its arthritis of any kind. Any help would be much appreciated!