Dry mouth and bitter mouth at night is mostly caused by hot steam bile overflow, should be prescribed by a professional physician, commonly used drugs such as gentian diarrhea liver soup. Gentian diarrhea liver soup has the effect of clearing the liver and gallbladder solid fire, clearing the liver meridian dampness and heat, spleen and stomach cold and Yin deficiency hyperactivity should not be taken. This formula is used in treating the symptoms of inflammation of liver and gallbladder, such as headache and redness of eyes, dystocia (pain in the area of coeruleus and ribs), bitter taste in the mouth, deafness and swollen ears; or the symptoms of damp-heat underflow of the liver meridian, such as swelling of the yin, itching, impotence of the tendons, yin sweating, drenching of the urine or yellow smelling of women’s diaphragm. After the appearance of discomfort should promptly seek medical treatment, under the guidance of the physician’s identification and selection of medication, not self-medication, in order to avoid delays in the condition.