Bad teeth, according to the theory of Western medicine, and the kidney has no relationship, but some Chinese medicine theory, consider having periodontal disease, and the kidney has a relationship. Because there are theories in Chinese medicine that kidney deficiency leads to tooth failure, and kidney consolidation leads to firm teeth, there are also some applications of Chinese herbal medicine for periodontal disease, mainly the application of solid tooth pill and solid tooth paste, which are effective for periodontitis in adolescents. Through Chinese medicine, the immune response of the host is regulated and the resistance of the host to periodontitis is enhanced. However, this efficacy needs to be confirmed by further research and clinical control experiments, there is no definite evidence, and according to the theory of oral western medicine, bad teeth have little relationship with the kidneys.