last night I noticed that getting up and walking around for a few minutes significantly improved the pain and numbness.
Definitely know this, just usually longer necessary for me. Posture changes for local pains as well as for the overall Ache and stiff hurt, which I now call that "post postural Ache". And just moving about helped me with all kinds of symptoms like stuffy nose.
So it was actually good for this that my bladder wakes me up regularly, and worse when something helped me sleep too "much" by zombifying (which to me is never restorative, so I avoid that at all cost).
Took me a while to fall back to sleep again, but at least the pain subsided.
Having had to be up 4-8x per night means I need good techniques to get back to sleep quickly, like taking care not to move too quickly, esp. going down/up, if necessary, not worrying, but enjoying dreamy relaxation techniques like NSDR/yoga nidra. Now I've improved to 2-3x/n, mainly by reducing screen time after 7pm. That takes me back to the problem of post postural Ache, which I combat with stretching while sleeping....:
pain that wakes me up is numbness and pain in my left hand (and/or pain in my shoulders, hips, arms and upper legs).
Could these all be posture, so influenceable by new sleeping postures, praps with the help of pillows?
That's how I do it, apart from all the stretches and pressing tendinitis points day and night too (generally I now sleep in recovery posture but with a slightly arched back). For hips and thighs I have a lamb skin under them to soften the mattress which otherwise has to be one of the hardest for my backbones, plus a thin soft topper on for my muscles/fasicae.