Dry mouth and bitter mouth in the morning should firstly be improved by life habits and diet adjustment, it is recommended to have a light diet and pay attention to quit smoking and alcohol. In addition, if patients who snore at night can easily cause dry mouth and bitter mouth in the morning, they need to be seen by the corresponding ENT department. In addition, whether there are oral ulcers, gingivitis, periodontitis caused by bacterial infection in the mouth, also need to give timely treatment. Certain digestive disorders such as gastric ulcers and gastritis can also cause dry mouth and bitterness, and a gastroscopy may be considered to assess the condition of the stomach. Certain biliary tract disorders may also cause bile reflux, resulting in symptoms of bitter mouth, and further hepatobiliary ultrasound is needed to clarify whether there are biliary tract disorders.