Frequent bad breath should be checked at a regular hospital to find out what is causing it. The cause is different, the treatment is also different, and the drugs taken are also different. If it is caused by inflammation of the gums or periodontitis, you can take oral oxaliplatin tablets, metronidazole, etc. If it is caused by a strong stomach fire, the medication used to regulate it is Huo Xiang Qing Stomach Capsules, etc. If it is caused by liver fire, you can drink gentian diarrhea liver pill. But no matter what, the mouth is an important carrier, only a clean mouth to ensure fresh breath, so it is very important to maintain oral hygiene.