
The tongue is a very versatile part of the body, as it helps with communication, helps maintain the health of the mouth and helps us keep ourselves nourished. But what you may not know is that the tongue also holds information about your physical and emotional health. Simple knowledge of the tongue can give you some great clues on how your diet, lifestyle and environment are affecting you internally.
The tongue is a muscle covered with a moist and pink tissue called the mucosa. Tiny bumps on the surface of the tongue are called papillae, and they hold thousands of taste buds that are responsible for detecting sweet, salty, bitter and sour tastes. There is also a fifth taste, called umami, which can detect glutamate-type of tastes, such as those found in green tea.
The tongue has three main parts :
Apex ? tip of the tongue.
Body ? remainder of the visible tongue extending all the way to the back of the throat.
Root ? attaches the tongue to the base of the mouth.The tongue is a unique because it is composed of all three of the embryonic layers of the body: endoderm, ectoderm and mesoderm, and represents a large part of the various tissues of the body.
Reading the Tongue's Clues
Our tongues can provide meaningful and fascinating information about our state of health. The bulk of knowledge about the diagnostic aspects of the tongue comes from ancient Chinese medicine, which clinically observed the tongue for over a thousand years. Chinese medicine uses three main factors when ?reading? the tongue, looking aat the coating, color and shape.
QuoteA Healthy Tongue

Tongue Health Thin White Coating
The tongue has a coating that represents the state of digestive function. The ideal tongue coating consists of a thin, white film on its surface, and indicates that the stomach and digestive system is healthy and functioning well during the process of digesting food. This coating is actually made up of bacteria, and while most people think they can scrape off, the fact is that scraping the coating does very little, as the bacteria grows back immediately.
In Chinese medicine, the white coating represents the residue leftover from indigestion, so a thin, white coating is considered normal and healthy.
QuoteThick Coating & Colors Tongue Health Thick White Coating

If there is a thick coating on the tongue, then there is an imbalance in the body that has impacted the physiology. This imbalance could be from functional changes resulting from disease or injury or it can be due to other factors such as lifestyle choices or aging.
A thicker, white coat means there is a predominance of weakness of physiological function in the body. So a heavy white coat would mean that some system in the body is not able to perform its physiological role in maintaining health, or may represent a viral infection.

Tongue Health Thick Yellow CoatingA thick, yellow coating on the tongue indicates a predominance of heat in the body, which could correspond to inflammation or a bacterial infection.

Tongue Health Geographic TongueA geographic tongue is one where the coating is peeled in areas and easily removed. This type of coating indicates a person who has pushed their body to the brink of exhaustion. This type of tongue is also associated with allergic disorders and autoimmune diseases, but these are severe manifestations. If you have a geographic tongue, it is a sign to slow down.
Tongue ColorsIn Chinese medicine, the tongue is an extension of the heart, and the color of the tongue is said to represent the health of the blood. Since the blood is what nourishes and maintains the body, the tongue color also shows overall health. Tongue color takes a long time to change, so it shows the state of one?s health over a longer period of time. The ideal color of a healthy tongue should be pale-red, which indicates good circulation of blood in the body.
Pale White Tongue
A tongue that is white or extremely pale can be a sign of a problem, and indicates a weakness in the digestive system. This can be accompanied by loose stools, extremity coldness, heavy fatigue and abdominal distention/bloating.
An extremely pale, dry tongue can also indicate a blood deficiency, which can affect women more than men, and is frequently marked by anxiety, dizziness, impaired memory, insomnia, chapped lips and eventually anemia.
Other Possible Issues
- Leukoplakia: An abnormal growth of the mucous membrane cells on the tongue surface. It is mainly associated with chronic irritation of the tongue by tobacco chewing and areca nut/betel leaf chewing. Tongue discoloration due to leukoplakia appears as white to gray patches on the top of the tongue and may also affect the inner cheek and gums
Hairy Leukoplakia: A similar condition believed to be caused by Epstein-Barr viral infection which is more likely to arise in a person with a depressed immune system, like in HIV aids
Oral Thrush: A fungal infection of the mouth, usually visible on the tongue, extending down to the esophagus, and caused by candidiasis/yeast infection. This is more likely to occur in a person with a depressed immune system like someone with HIV/AIDS and poorly controlled long-term diabetes mellitus.
Oral Lichen Planus: A condition that occurs for unknown reasons and causes "whitish" lines on the inside of the mouth, including the tongue, along with open red sores. It may affect the entire inside of the mouth and extend to the esophagus. Oral lichen planus is believed to be linked to certain infections, allergies, vaccines and certain medications.
Other possible causes of white discoloration of the tongue includes syphilis or can occur with a fever and dehydration. Paleness of tongue that may sometimes be mistaken for whitening can occur with conditions such as pernicious anemia (vitamin B12 deficiency) and iron-deficiency anemia.