I experienced hands going numb about 2 years ago, shortly after being diagnosed with T2 Diabetes. I saw a neurologist for that, who felt that it's related to lifting weights without gloves or prior near carpal tunnel symptoms (not diagnosed with it, however), not diabetic neuropathy. He advised me to get hand-straigheners for sleeping at night (I didn't-- too inconvenient).
Since then, about a year later, I was diagnosed with autoimmunity (Sjogren's) and I started on a gluten-free, casein-free, and dairy-free diet: did not completely implement being nighshade-free (kept hot pepper sauces) and egg-free. I experienced siginficant improvements: my eyes and throat didn't become as dry as before, and the hands going numb happened less frequently.
Recently, however, I started bringing some dairy back. Heavy cream and sour cream immediately got my hands going numb at night regularly. I cut that out. Then I brought some Lindt's 85% and 90% dark chocolates. At most I consume 10-20g per day. Yet that seems to be enough to trigger hand numbness.
Has anyone experienced dairy causing hand numbness at night? Perhaps the solution is to pernamently cut out dairy and also explore cutting out all nightshades and eggs?
Of course, this may have nothing to do with autoimmunity -- it could just be the remnant of my near carpal tunnel from years ago (I used to be a wordprocessor for 10 years). So perhaps it's worth asking people with autoimmunity who're treating themselves with food avoidance.