Bad stomach and bad breath can be treated with Qingguan Huanglian Pill, and H. pylori should also be eradicated, and people with oral diseases should be treated in time. A lot of people have bad breath due to the factor of stomach heat, patients with stomach heat can cause bad breath due to the accumulation of stomach fire, you can use Qinggonglianwan to treat it. The main function of Qingguanlianwan is to clear the stomach and remove the fire, and it also has the effect of improving the swelling and pain of the gums and sores on the mouth and tongue. After improving the symptoms of stomach heat, the bad breath of patients can also be eliminated. During the treatment period of using Qinggulanglianwan, you should quit smoking and drinking, and avoid eating too much meat and fishy food. Some people have bad stomach and bad breath, which is related to Helicobacter pylori infection, and can be diagnosed through gastroscopy and carbon 14 examination. The diagnosis can be confirmed by gastroscopy and carbon 14 test. After the diagnosis is confirmed, the four-phase treatment can be used for radical treatment. The main medications in quadruple therapy include two antibiotics, a bismuth agent, and an acid-suppressing drug. Many people have bad breath due to oral diseases, such as gingivitis, periodontitis, and dental caries, etc. These people need timely treatment for their oral diseases to help reduce bad breath.