Dry mouth and bitter mouth is mainly caused by the liver and gallbladder damp-heat (damp-heat evil Qi accumulation in the liver and gallbladder) or stomach heat and other factors, you can take clearing the liver and gallbladder damp-heat medicine and clearing the stomach heat medicine and other treatments, how long to see the effect needs to be based on the individual situation. 1. Liver and gallbladder damp-heat medicine: used to treat liver and gallbladder damp-heat syndrome, liver loss of drainage (liver drainage function abnormalities) syndrome, can be seen in the mouth bitter and dry, often accompanied by impatience and irritability, redness of the eyes and yellowing of the skin and other symptoms. Gentian Liver Pills are often used. 2. Stomach-heat remedies: For the treatment of bitter and dry mouth caused by stomach-heat, accompanied by stomach pain, noisy acid swallowing (discomfort in the stomach, swallowing after acid flooding) and constipation, etc., Compound Ginseng Tablets can be used. If there is a need for medication, it should be used under the guidance of a doctor, and should not be used blindly on its own, so as to avoid adverse consequences.