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As far as I know, that is not normal! While I am being silly, there is a such thing called a black hairy tongue. It is common among smokers. People with this condition usually have
http://answers.ask.com/Health/Diseases/why_is_my_t...
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Well, there seems to be a few different things that can cause black or hairy tongue. It is pretty common in smokers, and is sometimes seen after using antibiotics. Bad oral hygene
http://answers.ask.com/Fashion_and_Beauty/Jewelry/...
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Black tongue is an overgrowth of fungus or bacteria on the tongue. This can be present because a person has taken some medication that has a high level of antacid in it. This will
http://answers.ask.com/Health/Diseases/what_is_bla...
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The Chow and the Shar-pei both have totally black/blue tongues. But any breed can have a black spots. I have a schipperkee with a little black circle on the tip of his. Didn't know
http://answers.ask.com/Science/Nature/what_dogs_ha...
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