Sadly it's not tendinitis.
I'm getting very intense pins and needles (plus they go very cold) at night and first things in the morning (to about midday). It wakes me during the night even wearing supports in both wrists. Carpal Tunnel has been confirmed in 1 hand only but that only covers thumb and index/middle finger. I'm also getting ulnar nerve issues as well. And it's both hands...
Synovitis has been "confirmed" today by the radiological consultant and my doctor confirmed Aubenbach syndrome a few weeks ago though the frequency of this "blue finger syndrome" is considerably higher than the internet suggests I should be having (it suggests one or two episodes of it in a life time, I can prove with photos at least 10 episodes in the last 3-4 years alone).
The MRI of my left hand was useless because of all my previous surgery on that wrist/hand. About the only good news from all of this is that osteoarthritis has been ruled out in my wrists, which is about the only part of my body not affected by it!
My neurosurgeon doesn't think it's my spinal cord or nerve branches but other doctors/consultants are not so sure. I started with symptoms 12 months ago. So for the moment it's a case of coping and hoping someone trips over something they've missed or something turns up. At least my orthopaedic surgeon has agreed to carpal tunnel surgery on one hand as the next step in a couple of months time.