One of the many doctors I've seen, an Orthopedic surgeon, recently labeled my RSD as Cold. I was diagnosed last Fall with RSD in both hands...after two stellate ganglion blocks my arms turned to two giant ice cubes so I was put on Norvasc for my circulation.
In Febuary it spread to both feet, burning pain constantly and an almost overnight thing. My feet burn but to the touch feel cold. Ortho did a scan of my feet and cold stress test....basically no circulation. The scan should show red and my feet and hands were all blue with just a couple of red dots. That's when the Cold label came in. I still can go from hot to cold in moments but the cold external temperatures are really hard for me to recover from.
Hope this helps a bit....
Jeanne