What causes yellow tongue in the morning?

The yellow tongue coating may be caused by stomach fire, hot phlegm, liver and gallbladder damp-heat and other reasons.

1. Stomach fire

and stomach heat can form stomach fire, which can extend the upper inflammation of the foot Yangming stomach meridian, affecting the secretion of saliva, resulting in yellow tongue coating symptoms, accompanied by halitosis symptoms.

2. Hot phlegm

and phlegm fight with heat evil, gathering but not dispersing can form phlegm and dampness evil, which is easy to accumulate heat in the patient's body for a long time. At this time, yellow tongue coating symptoms will also occur.

3. Liver and gallbladder damp-heat

evil accumulated in the patient's liver can form liver and gallbladder damp-heat, resulting in liver and gallbladder dysfunction, unable to fully digest food in the stomach, causing yellow tongue coating symptoms.