Raynauds
a BS "phenomenon" that results in zombified feet and/or hands upon exposure to stress or cold temperatures; a painful and annoying disorder, often with no known cause, that results in blood flow being cut off to extremities, which then turn from white to blue to red/gray. Alternatively a symptom related to an autoimmune disorder.
Too bad I live in Ohio and it's -3° outside, because my Raynauds is being a s.o.b today and I can't feel my feet.