What is black hairy tongue?

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Black hairy tongue is a condition makes your tongue look as if it's covered in black hair or fur. The condition is almost always painless and temporary. It's usually caused by an overgrowth of bacteria on the tongue.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.