Tingling fingers here, then painful numbness of my hands and arms at night, needing me to either hold them straight above my head, with shaking to get the feeling to go again. Got so bad, i could only drive using one hand,, with the other held down , then swap when the numbness took over the one on the wheel. I even had to sleep upright on a loungechair in the end as the pain was shocking, and went right up to my shoulders. My gp had me on constant penedeine forte, heat packs, and had splints molded for both arms at the hospital physio dept,,, and then took my bubba 2 weeks early via c-section to end the pain, as i was crying up all night, and had to alternate with putting my arms into VERY hot water, then putting them straight into cold water, and back into hot again etc. (sounds strange,, but it does kinda stop the nreve pain from it slightly)
I didnt have it with this last one at all badly though,, just a slight numbness at night, no pain,,,, so just shows it does not necessarily effect you with every pregnancy