I tried hot tubs after aqua theraphy, because the the water was so cold in the pool, and I needed to warm up! I can't do the aqua therapy anymore because of this plus the surgeries I am still healing from, but the hot tub was nice for a short period of time. I like warm baths too. I had a little redness and swelling after the hot tubs, but it took some of the aching away. I just had to go in really slow! I didn't have the burning then that I have now, so I don't know if I could go in one again.

I've never really had goose bumps, except when cold. I do get sweaty palms and feet though. And when people bump in to me I sometimes get that shooting electrical like vibration, except mine is in my right rsd hand and wrist and travels up to my shoulder.
I am so sorry you have this and full body no less. I don't have full body, but mine is spreading and though my drs don't think that will happen, they aren't sure. Well take care and I hope you have as pain free as possible night tonight. Take care.