Ok, quick background to set up my question.
I'm a 20 year basement player, for fun, not a "good" player at all. Due to my job (sitting at a keyboard all day) my hands have suffered and I have had carpal tunnel surgery on both hands in the last ten years. Admittedly my hands don't work so great and I have rather short (non-spider, LOL) fingers to begin with.
Now, I also have had issues (including arthritis) in the basal joints of my thumbs. I only play when my hands let me but when I'm feeling good, I try to practice and play sensibly but I'm really wondering if I have a thumb that just doesn't turn correctly, lol. The photo hopefully will explain this.
Due to the condition of my hands in general and the length of my fingers (not an excuse I know), I have a hard time trying to keep my thumb and wrist in a neutral position, especially on the 3rd or 4th string and when I move up the neck.
Using the analogy of gripping a tennis ball or a can of your favorite beverage, my thumb already is at an awkward angle, like it wants to face down instead of towards the tips of my other fingers, if that makes sense.
I've tried to let the thumb go and let it point more towards the headstock but again, as I move up the neck or to the 3rd and 4th strings, my thumb wants to roll in. Yes, it's not good, yes it's amazingly wonky and no, it's not healthy. I know most of here are not doctors and I'm not looking for a diagnosis but has anyone else seen or have had this odd problem with thumb mobility?
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