Bitter mouth and yellow saliva in the morning is mainly considered to be caused by abnormal liver metabolism, cholecystitis and gastritis. 1. Abnormal liver metabolism: When the work and rest is not regular, too much pressure, diet will cause liver metabolism abnormality. The symptoms of bitter mouth and yellow saliva in the morning, accompanied by red eyes and irritability. This can be improved by drinking more water, regular work and rest, and avoiding spicy and stimulating foods. 2. cholecystitis: cholecystitis patients with bitter mouth may be due to poor bile discharge caused by bile stagnation, which triggered the symptoms of the morning mouth bitter saliva yellowing. The cholecystitis caused by the morning mouth bitter saliva yellowing can be oral anti-inflammatory bile tablets, levofloxacin and so on. 3. gastritis: gastritis patients may appear bile reflux, gastroesophageal reflux and other symptoms will lead to the morning mouth bitter saliva yellow, gastritis is mainly the application of inhibit gastric acid drugs and gastric mucosa protection drugs, such as lansoprazole, colloidal bismuth pectin. Bitter mouth and yellow saliva in the morning may also be caused by other reasons, daily attention should be paid to avoid eating sour and spicy, greasy food, keep a happy mood and regular rest and relaxation. If the symptoms worsen, you should go to the hospital. The above medications should be used under the guidance of a physician.