Why do neurological pains seem to get worse at night?

I remember 20yrs ago just before I had a carpel tunnel surgery on my right hand, the pain would worsen at night.

Right now, with the stupid numbness in my left hand, it feels like my left hand is being crushed right now. Like someone parked a steamroller on top of it. I want to go to sleep now. That's going to be a problem.

stupid $%&^ing MS!!!!!!!

At least the tendinitis pain in my elbow seems to be getting some relief from the pain med the doctor gave me today. Wish it worked on the neurological pain.