Do not laugh, but what actually cured it was buying a new handbag and a new pillow !
Glad the new handbag and pillow helped, Lady Bird. My late wife's grandmother always used to say that a new handbag and a new hair-do would give a woman a new outlook on life.
Thank you, I read his book "Healing Back Pain" years ago and attended his lectures at NYU Hospital. He helped me tremendously. He was a great man indeed. It's beginning to look like a vitamin B12 deficiency.
Brian, I hope the vitamin B12 supplement will help solve the issues you are having.
A few years ago, I was waking up in the morning and my little finger, and ring finger on my left hand were numb feeling. It would get better on in the day, but it worried me and I scheduled an appointment with an orthopedic doctor. I also did some research online, and learned that it could be irritation of the ulnar nerve that comes down from the shoulder to the hand.
The Dr. x rayed my left shoulder and elbow and said everything look okay, and I was irritating the ulnar nerve in my elbow by sleeping with my arms folded. He said I needed to try and sleep with my arms straight, and there was a special brace I could wear if needed, to keep my arm straight when I slept. He also said if the problem persists, he could do surgery and move the ulnar nerve to another location at my elbow. That was NOT something I was interested in.
So, I've learned to keep my arms as straight as possible when I sleep at night. I still get the symptoms if I bend my arm at night while I sleep, but the symptoms are not as bad as they were previously. I guess when we get older, we have ailments we have to deal with.
I have never noticed any pain or discomfort whatsoever while playing the piano, ever. So, I guess my technique, although probably not proper, is not harmful either.
All the best!