Color changes occur with circulation issues as ChaucerFan explains.
There are so many causes for Raynaud's...I've seen lists pages long!
But color changes also come from RSD... now called CRPS..
We have an RSD forum here.
The most common cause of Raynaud's in women is autoimmune disease. Lupus in particular. But the other types of autoimmune diseases often affect the circulation.
I'd see what your doctor thinks.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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