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Not really. Blue fingernails can be a sign of hypoxia, a lack of oxygen in the blood. This can happen at high altitude such as mountain climbing or flying in a depressurized airplane higher than about 12,000 feet altitude.

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10y ago

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Which of these is a sign of dehydration shivering sleepiness talkativeness blue fingernails?

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Can carbon monoxide turn your fingernails blue?

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My question is what is a dark line on you fingernail is it a sign of cancer?

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