Short history; Once upon a time I picked up guitar and got to an intermediate level then decided I wanted to play bass too so I played around a little bit but never got too serious, then life happened and I stopped playing both. Recently I felt it was time to start playing bass again so few days ago I borrowed a bass from my friend( bridgecraft model
OS
). Yesterday I practiced for about two to three hours until I started to feel a pain in mostly my pinky and ring finger. Now today while practicing I can barely use my pinky and when I do it is pretty painful to do so. Does anyone have any idea what this could be from? The action on the bass is pretty high and I want to blame that, but I'm not sure if it's that or technique/finger placement, or even just over-working those fingers/muscles. Is there any training/warmup exercises that could help to strengthen my fingers to where the pain won't happen or at least not as much?