Halitosis caused by kidney yin deficiency and liver fire excess requires nourishing yin and lowering heat to solve the problem. Do not eat spicy and greasy foods in your diet to avoid damaging yin and causing fire. In daily life, be sure to go to bed early and get up early, and do not stay up late to avoid damaging the liver and kidneys and causing internal fire. You can eat more watermelon in the afternoon, which nourishes yin and cools blood to reduce the scorching heat all over your body, which can alleviate the problem of kidney yin deficiency and liver fire. Then you can soak 15 grams of Rehmannia glutinosa and 15 grams of Cassia seeds in water and drink it frequently in the afternoon. It can nourish kidney yin, reduce heat, and clear liver fire. Consistent drinking can solve your problem of kidney yin deficiency and liver fire, and you will naturally stop having bad breath. In terms of medication, you can take Dabuyin Pills, which nourish yin and reduce heat, and Longdan Xiegan Pills, which clear liver fire, to solve the problem of kidney yin deficiency and excessive liver fire. However, although bad breath is easy to solve, it is extremely difficult to cure kidney-yin deficiency and liver-fire excess. It is best to find a good traditional Chinese medicine doctor for careful treatment. The above is my answer to your question, thank you. Follow-up question: How to take this medicine? Please give me some more advice! Thanks. . . What specific medicine can be taken to cure it? Answer: Dabuyin Pills and Longdan Xiegan Pills can restore your health. Just take it according to the instructions. However, both of them nourish yin, reduce heat, clear the liver and remove fire, so they are not suitable to be taken in the morning, and are best taken in the afternoon and evening. The above is my answer to your question, thank you. Follow-up question: Dabuyin Pills and Longdan Xiegan Pills, should I just choose one of the two?" Or take one? Answer: It’s not just a matter of taking one, but both. Dabuyin Pills solve the problem of internal heat due to yin deficiency, while Longdan Xiegan Pills clear your liver fire, thus restoring your health more effectively. The above is my answer to your question, thank you. Follow-up question: How much does Dabuyin Pill cost? Where is it produced? Answer: The prices of Dabuyin Pills vary from place to place, including from each manufacturer. There are many places for Douchan, such as Beijing Tongrentang, Shaanxi Huaxi, Wuhan Zhonglian, etc. The cheaper ones are more than ten yuan, and the expensive ones are dozens of yuan. The above is my answer to your question, thank you.