Ok so I have had poorly controlled diabetes for 20 years. I am working on that.
It is not that often that I wake up with a "normal" blood sugar but when I do my hands are numb. This doesn't happen when my bgs are higher. I would have thought it would be the other way round. Also if I have a "normal" bg during the day and I do a bit of knitting my hands go numb - or more pins and needles really. I wonder if this will resolve itself once my bgs are always lower - if that ever happens!
On a similar note, my trigger finger and thumb appear to be resolving themselves without having the operation.