Long-term bad breath may be caused by stomach fire, food accumulation (food indigestion and stagnation in the stomach), phlegm heat, etc., respectively, you can choose Huanglian, hawthorn, zhebeimu and other medicines to make tea to drink. However, the active ingredients of tea are limited, and decoction is recommended. 1. Bad breath caused by stomach fire is usually accompanied by thirst for cold drinks, swollen and painful gums, mouth and tongue sores and other symptoms. You can choose Huanglian to soak in water, Huanglian has the effect of clearing stomach fire. It is often used to treat bad breath caused by stomach fire. It should not be taken by people with spleen and stomach deficiency (weak and cold spleen and stomach), and the adverse effects have not been clarified. 2. Bad breath caused by accumulation of food is usually accompanied by distension and fullness in the epigastrium (abdomen), vomiting and acid swallowing (swallowing the acid in the stomach that rushes upward to the oropharynx), poor appetite and other symptoms. You can choose hawthorn to drink in water, which can play the role of eliminating food and strengthening the stomach (promoting food digestion and strengthening the function of the stomach and internal organs). Those who have excessive secretion of stomach acid and those with weak spleen and stomach should not take this medicine, and the adverse effects have not been clarified. 3. Bad breath caused by phlegm-heat is usually accompanied by coughing and spitting up phlegm. You can choose Zhe Bei Mu to make tea, which has the effect of clearing heat and resolving phlegm, detoxifying and dispersing. Adverse reactions and contraindications have not been clarified, and can not be used with aconite and epiphyllum. Tea drink efficacy is limited, not a substitute for medication to treat the disease, physical discomfort, it is recommended to go to the hospital in a timely manner, so as not to delay the condition.