There are many causes of bitter mouth and dry throat: firstly, gastrointestinal diseases, such as gastrointestinal dysfunction, bile reflux due to cholecystitis, reflux esophagitis, etc. It is recommended to perform gastroscopy and ultrasound examination, and to use drugs to relieve liver and bile, liver and stomach for treatment under the guidance of physicians. The next consideration is oral diseases, such as gingivitis, periodontitis, etc., and suggest symptomatic treatment. Again, fatigue, excessive smoking, alcoholism and lack of sleep can also cause bitterness in the mouth. From the perspective of Chinese medicine, bitter mouth and dry throat are mainly caused by damp heat in the liver and gallbladder and inflammation of stomach fire, which need to be treated with Chinese herbal medicine under the guidance of Chinese medicine practitioner to clear damp heat and remove stomach fire.