White tongue coating may be caused by cold and dampness, or poor diet. For white tongue caused by feeling cold and dampness, Qiang Wu Sheng Dampness Tang with addition and subtraction and Da Yuan Drink with addition and subtraction; for white tongue caused by dietary irregularities, Warm Spleen Tang with addition and subtraction should be applied. If one is cold after sweating out, or windy after bathing or wading in rain, or lives in a damp place and feels the cold-dampness, the cold-dampness overflows to the upper part of the tongue, and the cold makes the tongue white, and the dampness makes the tongue greasy, then Qiangwu Shengdian Tang with additional subtractions can be applied. Dampness and turbidity are trapped internally, and when external evils are felt again, dampness and heat enter into the body from the surface and lie between the membranes, yang qi can not be stretched out, and dampness and turbidity are flooded on the upper surface of the tongue, so the tongue coating is white, and Dahuan Drink can be used to add or subtract. Normally, over-eating raw, cold or sticky food damages the spleen and stomach, resulting in spleen yang not being vibrant (deficiency of yang qi in the spleen), malfunction in transporting and transforming food, water-dampness coagulating into phlegm-drinks (pathological products formed by impaired metabolism of water-liquid), and cold-drinks upwardly flooding the body, so that white tongue-coating is seen, and Warm Spleen Soup with additional subtraction can be applied. The effect of drugs embodied in each person is different, so the use of drugs need to be guided by a doctor, not self-medication.