The cause of dry mouth, bitter mouth and bad breath: 1. Liver and gall bladder damp heat, damp heat stagnation, stasis and heat, dry mouth, bitter mouth, sticky mouth, do not think about eating, stomach fullness and discomfort. The formula is Gentian Diarrhea Liver Pill plus Danjuania Free and Easy Pill, plus or minus. 2. Heart fire, irritability, dry mouth, bad breath, panic discomfort, etc., to clear the heart fire, Tianwang Tonic Heart Pill, plus or minus. 3. Spleen deficiency and damp heat, will also appear dry mouth, bitter and bad breath symptoms, oral Qing Stomach Detoxification Pill or Ganlu Disinfection Pill, plus or minus.