Vasoconstriction: Not sure you'll ever get a "straight" answer to this. When any skin is exposed to cold, the local blood vessels constrict to reduce blood flow preventing heat loss from the body. When this reaction is exaggerated and prolonged in hands & feet its called Raynaud's syndrome. At 72 you can have diminished circulation anywhere for many reasons & the end result would be the same exaggerated reaction.
Answered 8/19/2020
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