Bitter mouth, bad breath and yellow tongue coating are the result of stomach fire, spleen and stomach disharmony, spleen and stomach dysfunction will cause digestive system disorders, a common manifestation is bile reflux, the bile should be discharged to the duodenum reflux back to the stomach, so the bile will also flood out to the mouth, there will be the phenomenon of bitter mouth. In this case, you can take Huo Xiang Qing stomach capsule orally, usually in the diet also pay attention to eat more winter melon and bitter melon, eat more easily digestible food, avoid spicy stimulation, avoid too heavy taste, light diet, but also drink more green tea, pay attention to maintain oral hygiene, brush your teeth in the morning and evening, carefully clean the tongue. Stomach fire is also prone to oral diseases, so it is more important to keep the oral cavity clean to avoid bacterial infections in the mouth.