It's important to remember from a diagnostic standpoint that not everyone with CRPS/RSD experiences significant skin discoloration and/or swelling. I am in this group, although I've had CRPS for 4 years, which is now in the entire right side of my body. I don't experience noticeable swelling, and although the skin on many areas of the right side of my body (particularly my hand/arm/feet/thighs/cheek) often turn red when cold, this redness goes away when I warm up.