HI Ann. RSD is short form for Reflex Sympathetic Dystrophy or Complex Regional Pain Syndrome. It is a painful neurological disease whose hallmark is "pain out of proportion to the injury: ( ie a sprain or fracture). It is unexplained persistant pain.
My leg and foot is always freezing and changes color, goes from normal color to purple.
I had never heard of it before neither until I ended up with it and I wish that I had never heard of it now that I have.
I hope whatever is wrong with you that you can get some releif. My heart goes out to you, hang tight and don't give up.
Connie