[quote name='Skinnytwotimes' post='292210' date='Sep 25 2008, 09:35 PM']Any advice? Thanks.[/quote]
I have had just this problem recently and it has disappeared. I was playing a Stingray clone, I now, courtesy of OldGit, own a Japan Fender Jazz Bass and the problem has disappeared. I would suggest you have a geometry problem - the angle that your hand is extending to the bass, or the thickness of the neck, are giving you pain. I changed bass and the problem went away. I think my problem was worse because I have quite short arms, but the jazz bass configuration was the answer to exactly this problem.