What Causes Black Tongue in Humans?

Answer

Black tongue is a condition where the tongue surface turns dark. It is caused by overgrowth of fungi or bacteria in the mouth, bad oral sanitation, heavy smoking, drinking very hot coffee/tea and excessive intake of antibiotics.
Q&A Related to "What Causes Black Tongue in Humans"
They really don't know what causes it! It seems to happen alot in smokers and folks with bad oral hygene habits, which sounds logical, but it can also occur while taking antibiotics
http://answers.ask.com/Health/Diseases/what_causes...
A black tongue typically occurs when the tongue papillae, which are tiny projections on the tongue, grow longer than usual and do not shed the way normal papillae do. Debris and bacteria
http://www.ehow.com/facts_5165014_causes-black-ton...
Sometimes the upper surface of the tongue turns black or brown in color.
http://www.chacha.com/question/what-causes-a-human...
An infection stemming in the isthmus region of the mouth spreading to the frontal part of the tongue causing lack of oxidation to frontal occipital regionalis.this usually occurs
http://wiki.answers.com/Q/What_causes_black_tongue
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