Yellow coat indicatesincreased body temperature or fever, that more precisely is a sign of bacterial infection or inflammation.
Peeled tongue presumably means that your body is completely exhausted and with no energy. Also indicates allergy and autoimmune diseases.
If you have inflammation, only the tip of tongue is red, and the redness is transferred through the whole tongue. If only the sides of the tongue are red – you should stop consume fatty foods, spices, alcohol.
Purple tongue appears if there is lack of B2 Vitamin and if woman have tough menstrual cycle.
Black tongue appears rarely and shows illness. Also often is a birth defect and is permanent.
Blue tongue points out that there is lack of oxygen or cyanosis. It appears if there is heart failure or disruption of the blood.
Yellow tongue color is extremely rare and indicates jaundice.Advice: You should maintain hygiene of your tongue, and the best time for that is after you wake up, in the morning, on empty stomach. This should be your routine just like washing the teeth.
It is very simple -just scrape the entire surface of the tongue