Hi there!
Well, without a clinical evaluation it would be difficult to determine the cause of your symptoms. Possibilities that may need to be considered include neuro-muscular issues such as nerve impingement, muscle injuries, inflammation, joint causes such as degeneration, vascular causes, micronutrient deficiencies etc. I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management.
Hope this is helpful.
Take care!
Thank you very much gor your response.
I happen to see your post. How are you coping with your problem? I 64 yo man and I used to have similar problem 8 or 9 years ago and have tried many types of medication then. It seems that my problem just gone away after I sleep with an old ancient type design pillow. This ancient type of pillow is about 6cm high x 5 cm wide and approximaly20 cm long. I sleep with this pillow in the "resuscitation" position, whereby the pillow is actually stretching my neck so that I could breathe normally. Since then my arm does not have the problem again.
If your problem still precedes, you can try my experience.
Good luck