I've never heard of that but I've had coldness in my rsd hand since I got rsd, and when i have pain in other parts of my body they cold too. My skin feels cold and my bones do too sometimes. I get coldness on my stomach where I had my surgeries and on my right hip where I have osteopenia. It is followed by pain but not alot of swelling. I do get some swelling in my hands but not like when I first got rsd. My feet even get really cold and tingly like pins and needles sometimes. And then sometimes my feet get hot an burn like last night. sometimes my hands get all sweaty usually first thing in the morning but that doesn't happen alot. Anyway thanks for telling me about cold rsd. I think maybe that may be exactly what I have.