Yes, I have a tendency to not rotate my hand properly when reaching for the E string, likely developed from playing guitars with flat, non-radiused fingerboards. Something I definately need to work on.
Over the years I have been evaluated medically for carpal tunnel, arthritis, tendon damage etc. I have had X-rays and nerve conduction tests though that was a long time ago. But
AFAIK I have none of those standard sort of conditions except for the stretched tendons that run across my left wrist.
In addition to the old injuries, I do have a neuromuscular condition that affects my whole body but is worst in my hands and feet. It causes pain, some degree of weakness and problems with my joints. I do the best I can but I have had to drop many activities over the years. Rather than get too depressed over those things I am absolutely unable to do, I am trying to turn my attention back to playing music.
I live in the Greater Boston area, a city where everyone claims to be music teacher, and many are probably very good. Still, I have learned that the devil is in the details and in the teacher's ability to see what the student is doing with absolute clarity and to explain and demonstrate those small details of technique from the bottom up. I think that some teachers I have encountered have a degree of natural affinity for the instrument and a level of experience that makes them take certain details for granted while I am klutzy and inexperienced enough that I need every single thing taught and explained to me.
Whew, that was a mouthful but hopefully you get the idea.
Peace,
S