This poor diet choice can lead to a 'black hairy tongue', dentist warns; A black hairy tongue might sound like a horror story, but one dentist has issued a warning that it could be an indicator of a diet missing a crucial element, worsening poor oral hygiene

Byline: By, Lauren Haughey A black hairy tongue may sound like something pulled straight out of a nightmare. But one dentist has now warned that it's a tell-tale sign that [...]