Isn't it weird the skin "temp" issues we have with CRPS?
I started with both cold and hot issues, but over time I now just have "hot" CRPS. The cold has gone away.......probably best as I live in Minnesota, where I get enough cold every time I walk out the door this time of the year!!
I actually have an infrared point and shoot thermometer that I use for automotive repair to measure the difference in temps from one limb to the other. Not as accurate as what you'll find at a clinic, but sure can show how much different the temps can be! My podiatrist just laughed and showed him how I was getting my temp readings!