Hello & Welcome to Just Answer,
May I ask you a few questions in order for me to understand your situation better.
1) Is it the first time that you are having such a problem with this arm and hand?
2) Can you raise your arms above the shoulder and move it around the shoulder?
3) Any swelling/ redness/ skin discoloration/ etc?
4) Any history of injury/ heavy exertion/ neck issues?
5) Any history of diabetes/ thyroid issues?
6) What would be your approximate age?
7) Any other medical issues/ significant history?
Thanks. Shall be waiting for your reply.
Thanks for the additional details. It seems that we may be dealing with a mix of problems out here, which lead back even to the accident that you had which probably has resulted in constant neck issues, to the underactive thyroid.
Going by your descriptions, the pain that you are having around the shoulder and shoulder blades is possibly due to the neck issues which are leading to a pinched nerve. That said, the problem with your hand seems to be arising possibly due to carpal tunnel syndrome. Kindly have a look at this web resource which provides authentic details about this condition:
I hope that this information helps. Best wishes. Please feel free to enquire if you have any remaining concerns/ doubts, as it shall be a privilege and a pleasure to try and help as much as I can.
Thanks for the query. A sudden nerve issue overnight would not be causing inability to bend the thumb and the index finger along with the pain that you have described. It is just incidental that these two separate problems are coinciding.
That said, without the benefit of a detailed clinical, and having to go just by the descriptions that are being provided, this seems to be the case as of now. Nevertheless you need to check in with your doctor and get a detailed examination done so that the cause may be found and appropriately managed.
As I do not feel that this could be nerve related problem that has occurred just overnight, I have opted out so as to encourage other experts to help you with a satisfactory response.
Best wishes and kind regards.