hey can any one tell what causes Black Hairy Tongue, one of my friends father has it its like black and hair like.. someone said its due to HIV infection, is it true?
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Black hairy tongue is quite common and harmless condition. Those little bumps on tongue sometime grows and trap foods, bacteria yeast and other things and in the long run its gets stained and gives black color. Casautive factors are oral antibiotics, excess use of coffee, alcohol, smoking, poor oral hygiene, and some times underlying systemic conditions, such as malignancy.
In most cases good mouth and tongue cleaning will get rid of black hairy tongue. If that doesn’t help, you need to consult dermatologist for some prescription medications.