Why does my thumbnail turn blue?

Why do my fingernails turn blue when I am warm?

  • For the last few years, I have noticed that my fingernails turn blue when I am warm. I know why they do this when I am cold, but warm???? During a hot shower they turn blue or even when I am just sitting in bed, my hands will suddenly turn bright red, then warm and then my nails turn a blueish purple color. It always fades after awhile, but it kind of concerns me. I can't seem to find any information about why they would do this when warm. Any ideas?

  • Answer:

    Lack of circulation?

Nyx at Yahoo! Answers Visit the source

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