Alright so I got out of playing bass over the school year, and I picked it back up again this summer. And I noticed that while i'm playing my thumb starts getting this sharp pain going through it. It never did it before I quit playing. Just now after I picked it up again. I don't know if i'm putting to much pressure on my thumb while i'm picking or what. Has anyone else had this problem and if so howd you fix it? Any input is greatly apreciated.