White patches on tongue, or a completely white tongue, have several possible causes. However they are completely different in nature, so first, take a good look at your tongue and see exactly where the white patch on tongue is, or if you have a completely white tongue. If the top surface of your tongue is pretty much completely white, or grey-white, then it is likely to be a coating on tongue that can be removed by brushing. This may seem strange if you have not brushed your tongue before. But brushing your tongue morning and night after brushing your teeth will remove a whole lot of bacteria build-up from your tongue.

CAUSES OF WHITE TONGUE
Oral Lichen Planus (OLP)
Dehydration
Illness or infection
Reaction to certain medications
Environmental irritants
Poor oral hygiene
Tobacco exposure or alcohol consumption
Candida yeast infection (Oral Thrush)
Tongue inflammation, such as Glossitis
Spicy foods such as habanero and jalape?o peppers contain compounds in the peppers that are correlated with white tongue

HOME REMEDIES FOR WHITE TONGUE
If you suffer from white tongue, there are a few home remedies and lifestyle changes which may provide some relief from the problem. While these ideas are not beneficial to everyone, they can offer some help to many who suffer from the problem. All of these are remedies which can be done at home.

Sea Salt or Kosher Salt: Some find some relief from mixing salt with water to create a homemade mouthwash. Use it first as a mouthwash, then brush your teeth with salt, including your tongue. This is a favorite home cure for the problem that has been effective with some people with the condition.

Glycerin: Glycerin is a soft natural substance which helps some people with white tongue. It can sooth their tongue and may also whiten the teeth.

Acidophilus: This substance works as a coating for the tongue. It is a Probiotic so it also promotes healthy digestion