Thick yellow tongue coating is generally caused by excessive damp-heat in spleen and stomach, so taking medicine is generally based on invigorating spleen and stomach, eliminating dampness and clearing heat. & ltbr & gt& ltbr & gt You can choose Sanren Decoction and other drugs, avoid spicy and hot foods in your diet, and choose Pogostemon, Eupatorium odoratum and raw malt for maintenance when soaking in water.