I can also relate to the cold limb. My arm/hand goes cold all the time. It turns very white or some times bluish/purple looking and feels like I have had that one limb in the freezer for awhile. It happens often during the day but I find at night is when it happens the most. I wake up to a numb, cold limb a few times a night.

My physio therapist suggested I use a warm cloth or run it under warm water. She cautioned me though to be very careful not to burn myself as I probably wont feel if the water gets too warm. Usually I will use the cloth, but the times I do run warm water over it I make a point of keeping my left hand in the water as well in case it does become hot and I don't realize! I really don't know if this does anything or not. I think honestly it just gives me some piece of mind that I am doing something to help the arm... fact is that time seems to be the only thing that will help the arm warm up again.

Take care,
Karen