Thick and greasy tongue coating a little yellow is mostly due to the body of dampness and heat, or by phlegm and heat, or for food stagnation (food indigestion and stagnation in the stomach), such as the cause of corruption. Thick tongue coating is mostly due to stomach qi and entrapped phlegm dampness and turbid qi or food turbidity and other fumigation on the stagnation of the tongue and become; greasy moss is often due to dampness and phlegm (water metabolism disorders in the formation of pathological products) and other obstruction of yang qi, stopping the tongue caused by the tongue, thick and greasy tongue coating is more often seen in the dampness and turbidity, food, phlegm and drink, and so on. The yellow color of the tongue coating is mostly the main heat or internal evidence, the tongue coating is thick and greasy and yellow, mostly known as yellow greasy moss, often for the dampness, food accumulation, phlegm and drink and other stagnation of the performance of the heat. Overeating, fat, sweet and thick flavors, etc. lead to the body of dampness, food accumulation, phlegm and other heat can be seen in the tongue thick and greasy and yellow, specific should be combined with the relevant symptoms and other identification and analysis. For example, dampness and heat are often accompanied by skin eczema, sticky stools, etc.; food accumulation has more constipation, bloating, etc.; phlegm drink has more fat phlegm and other symptoms. When yellow greasy moss appears, please consult a doctor in time to receive standardized treatment.