What happened to yellow tongue?

Tongue coating yellow, under normal circumstances, most of them are caused by digestive system diseases, such as spleen and stomach damp heat, stomach heat or liver and gallbladder fire, liver fire inflammation and other factors, can cause tongue coating yellow, dry mouth and other manifestations, you can go to the local Chinese medicine after syndrome differentiation diagnosis, see what is the cause, and then symptomatic treatment, if caused by liver and gallbladder fire, under normal circumstances can be oral Longdan Xiegan Pill, if caused by stomach heat, can be oral Yangyin Qingwei Granules, Or Huanglian Qingwei Pill, can also go to the local traditional Chinese medicine syndrome differentiation with traditional Chinese medicine treatment, traditional Chinese medicine has clear liver and gallbladder, purging fire and clearing heat, nourishing yin and nourishing stomach.