Dry mouth and bitter mouth may be caused by stomach fire, liver and gallbladder damp-heat (damp-heat evils accumulated in the liver and gallbladder), etc., and can be treated with Niuhuang Qinggou Pills and Longdian Diarrhea Liver Pills respectively. 1. Dry mouth and bitter mouth caused by stomach fire can be treated with Niu Huang Qing Stomach Pills. Niu Huang Qing Stomach Pill is used for dizziness and dizziness caused by fire in the heart and stomach, mouth and tongue sores, swollen and painful gums, breast moth (related to tonsillitis in Western medicine), sore throat, constipation and urination; pregnant women should not be taken. 2. Dry mouth and bitter mouth caused by damp-heat of liver and gallbladder can be treated with Longdian Diarrhea Liver Pills. Gentian Diarrhea Liver Pill is used for dizziness and red eyes (dizziness and red eyes), tinnitus and deafness caused by dampness and heat of the liver and gallbladder, dystocia and bitterness of the mouth (pain in the area of dystocia and ribs, bitterness of the mouth), redness of the urine, and dampness and heat of the leucorrhoea; it is not recommended to be taken by those who are weak in spleen and stomach for a long period of time, and should not be used by pregnant women and those who have stomach cold. If you need to use the medicine, you should go through the doctor’s diagnosis and follow the doctor’s instructions to standardize the treatment.