I am almost always cold, unless I get into a tub of hot water (best thing for me... I know many with MS can't tolerate a hot bath).

Cold to the bone indeed, that's exactly how I am all winter long, and a good portion of the spring/fall. Even in air conditioned buildings sometimes.

I do find that keeping active, I'm less cold than if I just veg. So I walk a lot, and that seems to have helped my personal temperature levels.