Before I was dx'd, I found out the hard way (twice) that I can't tolerate hot tubs anymore..
I can take hot showers and warm baths, as long as I'm not in too long. The ragdoll effect takes hold in the summer, too. I did discover (out of desparation), that a popsicle goes a long way to making me feel better when that happens.
The cold never used to bother me at all. When my son was ski racing, we'd get up early and I'd be standing out in the cold watching. This year, it's bothered me a lot. We never got above zero yesterday, with a wind chill near 40 below when I left for work. Today, I could only work half the day because I'd get this "shivery" feeling and muscles would start spasming in by jaw, neck, and back..I feel like I've been on American Gladiators, my body's so sore.