Just as your gums and teeth require a regular hygiene routine, maintaining the hygiene of your tongue will directly benefit your overall oral health care. Bacteria often builds up on the tongue ID-10065252contributing to halitosis (bad breath) and may contribute to tooth decay and gum disease. This bacterial layer often discolours the surface of the tongue making it appear white-yellow. Along with this bacteria, decaying food particles,
fungi and dead cells from the tongue also accumulate.
So how can you improve your tongue hygiene?
  1. Use a tongue scraper or a toothbrush to scrape/brush your tongue
  2. Coat your tongue in toothpaste before scraping to neutralize bacteria and help remove it easily.
  3.  Rinse either with water, saline water solution or with regular mouth wash.
  4. Drink lots of water as dehydration can cause change of tongue colour

(Source: http://www.thehealthsite.com/oral-health/10-tips-for-better-tongue-hygiene-sh114/