2. Yellow tongue coating-Yellow tongue coating is the opposite of white tongue coating in heat syndrome, and yellow tongue coating is the performance of heat syndrome, so the color of tongue coating in stomach heat is yellow.
2 Thickness of tongue coating 1. Thin tongue coating is the embodiment of normal tongue coating or superficial syndrome tongue coating, which often means that the stomach is still in a state of balance between yin and yang, and there is no cold and heat bias, but for the time being, it is only the invasion of the defensive points by external pathogens, not the inside.
2. A thick tongue coating indicates that the disease is an internal syndrome, which may have injured the viscera, or entered the stages of qi, nutrition and blood.
3 whether there is tongue coating 1. Tongue coating is normally coated, and tongue coating is produced by stomach qi, so whether it is stomach cold or stomach heat, it is coated with tongue under the condition of healthy qi.
2. The absence of tongue coating from existence to absence is a manifestation of deficiency of stomach qi and yin and gradual decline of healthy qi; However, after the tongue coating is peeled off, there is a thin white coating coming back to life, which is the manifestation of pathogenic factors retreating into positive life and stomach qi gradually recovering.
4 Special circumstances 1. If the tongue coating is white and slippery and rotten, it must be stomach cold. If the tongue coating is white and slippery and rotten, it is also a manifestation of heat accumulation in the stomach, because the rotten coating is often a syndrome of food retention in the stomach, turbid phlegm and ulcers.
2. The tongue coating is covered with white clothes. If the tongue and mouth are covered with white clothes, and mildew coating or erosion spots appear, it is the performance of the decline of stomach qi, which is the danger of dirty gas, and special attention should be paid.