The third area is regional analysis.
Different areas of the tongue are represented by the functioning state of different regions of the body. For example, Area A of the tongue represents the functioning of the nervous system and the immune system. Any changes in this area can point to common colds, flu, upper respiratory infections, sleep disorders, and changes in mental state.
Area B of the tongue is represented by the liver and detoxification function of the body. Changes in this region can indicate changing toxicity levels in the body.
Darkening color in this region can mean pain and discomfort in the body. Area C is represented by the functioning of the digestive system and any changes in this area can be an indication of imbalance in the digestion and absorption functions in the body. Area D is represented by the urogenital systems as well as the intestines. Peeling in this region can mean adrenal weakness or chronic low back pains. Thickening of yellow coating in this region can mean either constipation or urinary tract infections. Other changes in this area can indicate problems in the urinary, reproductive and elimination systems.
So next time when we ask you to stick your tongue out, please do it with gusto and you do not need to close your eyes!