According to Chinese medicine, bad breath is mostly caused by the accumulation of food in the stomach and intestines, the accumulation of heat in the spleen and stomach, and the exuberance of fire in the heart. Elshotsholtzia has the effect of dissolving dampness and harmonizing the middle (eliminating dampness, harmonizing the spleen and stomach), Elshotsholtzia has the effect of trapping dampness in the spleen and stomach (dampness stays in the spleen and stomach), relieving the symptoms of greasy moss, nausea, vomiting, and epigastric fullness, etc. However, the effect of soaking in water is limited, and it is suggested to use it by decoction to ensure that the efficacy of the medicine is effectively exerted, so that it can achieve the purpose of treating halitosis. Modern medicine believes that Elsholtzia has an antibacterial effect, and Elsholtzia in water can also inhibit bacteria in the mouth, thus having a certain effect on the treatment of bad breath. Halitosis requires different treatments depending on the type of symptoms. If bad breath is caused by stomach fire, it can be treated with medicines that clear stomach fire, such as Qinggou San; if bad breath is caused by stomach and intestinal food accumulation, it can be treated with Baohe Pills; if bad breath is caused by heart fire, it can be treated with medicines such as Guizhi San. It should be noted that the adverse reactions and contraindications of Elsholtzia are still unclear. Before using Elsholtzia, you should consult a professional doctor in advance and take it under the doctor’s guidance to avoid adverse effects.