Bitter mouth after sleeping may be due to yin deficiency and fire (Yin essence deficiency in the body, hyperactive fire), liver and gallbladder dampness and heat (dampness and heat in the liver and gallbladder), etc., need to target the choice of proprietary Chinese medicines, you can take Zhibai Di Huang Pills, the great tonic pills, Longdian Di Huang Pills, liver capsules and other clear liver and gallbladder, and so on. 1. Yin deficiency and fire: Yin fluid deficiency, Yin does not control the Yang, then the fire is exuberant, the fire on the mouth will appear after sleeping bitter performance, you can choose Zhi Bai Di Huang Pills, large tonic pills, Qi Ju Di Huang Pills and other drugs to nourish yin and clear the heat (nourish Yin essence, remove the heat evil). 2. Damp-heat of liver and gallbladder: Due to over-eating of fatty, sweet, thick and greasy food or alcoholism, damp-heat is present in the liver and gallbladder, resulting in damp-heat of liver and gallbladder, which can be manifested in the form of bitter mouth after sleeping, dry mouth, distension and pain in the chest and ribs, and so on. Chinese medicines such as Longdian Diarrhea Liver Pills and Liver and Gallbladder Cleansing Capsules can be used to clear heat and dampness (removing heat and dampness from the body) and clear the liver and gallbladder. All of the above medicines should be used under the guidance of a professional doctor. It is recommended that people with bitter mouth after sleeping should consult a professional doctor in time.