Pay attention if your feet are sending you any of these 15 warning signs.
Toes that turn red, white and blue -- Raynaud's disease causes the extremities to first go white, then turn blue, and, finally, appear red before returning to a natural hue in cold weather. Raynaud's is usually not dangerous, but can be a sign of an autoimmune disease in some people.
Russian Federal Space Agency
John Stillwell/Royal Family
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From Family Photos/CNN
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