1. practice of scraping the tongue removes the white colour waste products from the surface of the tongue, and enhances the functioning of taste buds.
2. The ancient science of Ayurveda has taught that tongue cleaning activates the salivary glands (which aids in our digestion) and it revitalizes the throat. W
hen people complain of having a frequent sore throat, Ayurvedic doctors advise them to clean their tongues.
3. Sinus infections can also benefit from cleaning the tongue. If your nose is blocked by mucous, preventing the passage of air so you need to breathe out your mouth, the bacteria thrive. By regularly scraping the tongue with a tongue cleaner the excess mucous and any minor infection is removed.
4. clean the bacterial build-up, food debris, fungi, and dead cells from the surface of the tongue.
5. recommends tongue cleaning as part of one's daily hygiene regimen, to remove the toxic debris, known as Ama.
6. The surface of the tongue may be viewed as an excellent breeding ground for different bacteria. These microorganisms colonize and multiply on the protein-rich areas of the tongue, and eventually, through the saliva, reach all areas of the mouth including the teeth and gums. These bacteria are considered as major contributors to periodontal problems, plaque on the teeth, tooth decay, gum infections, gum recession and even tooth loss.
7. In addition, physicians[18][19] have reevaluated the link between oral health and pathologies of the rest of the body. Many clinical studies concluded that oral bacteria are associated with a number of serious systemic diseases.[20][21][22][23][24][25][26][27]
8. Cleaning the tongue with an appropriately designed tongue cleaner also massages the tongue. This is an important element of traditional Chinese medicine where the tongue surface is identified as an important reflexogenic zone.[30]
9. Tongue cleaning improves the sense of taste (because of cleaning the taste buds) and also stimulates the secretion of digestive enzymes.[31]
Source: http://en.wikipedia.org/wiki/Tongue_cleaner