Ummmm.... I know nothing of RS other than what I've read, but I found this to be interesting and it could be exactly what's going on with you.
-------------------

Under normal circumstances, when a person is exposed to cold or is under emotional stress, arterioles constrict to return blood flow to the core of the body, for warmth and protection.

In individuals with RS, the normal reaction is exaggerated—blood circulation in the arterioles is greatly restricted, resulting in a visible progression of symptoms as blood flow to the affected areas drops. Skin first turns white as it is deprived of blood, then turns blue (cyanosis) because of the lack of blood and oxygen.