Dry mouth, which is also known as xerostomia, is another possible cause.

Regular use of mouthwashes that contain irritating oxidising agents like peroxide is another contributing factor.

Other causes include:

  • Tobacco use
  • Drinking excessive amounts of coffee or black tea
  • Excessive alcohol use
  • Eating a soft diet that doesn’t help to rub dead skin cells from your tongue.

How to treat black hairy tongue

“Generally, this can be easily cured by good oral hygiene correcting any deficiency, and also brushing the tongue once or twice a day to remove the bacteria and fungi from the surface of the taste buds,” Dr Bhardwaj said.

Source: | This article first appeared on Express.co.uk