Try a big glass of milk with an NSAID (celebrex, aleve, motrin) before bed. Most likely u are experiencing this bc of a thickening tendon sheath putting pressure on a nerve (similar to carpal tunnel). The NSAID will reduce any inflammation u might have. It may or may not work but its worth a shot.
Where are u getting numbness? From shoulder and down or elbow , wrist?
If youre able to ice the area above the numbness pretty heavily before bed it may help as well.