There is no easiest way to get rid of bad breath, and there are different ways to remove it for different reasons. Bad breath is usually caused by caries, periodontitis, poor oral cleanliness and indigestion, etc. Patients can relieve the treatment by brushing, filling and medication. 1. Caries: Dental caries, residual roots and crowns easily lead to food impaction and harbor a large number of bacteria, resulting in bad breath. In order to avoid bad breath, it is necessary to go to the dentist for caries and fillings in time with the help of your doctor. 2. Periodontitis: A large number of bacteria can form in the mouth of patients with periodontitis, leading to inflammation of the gums and bad breath. Patients need systematic periodontal treatment such as cleaning, scraping and root planing, etc. Minocycline and other drugs can be used locally to relieve inflammation. 3. Poor oral cleanliness: If you don’t pay attention to brushing and rinsing, food debris will stick between your teeth or between your mouth. Over time, these food residues will ferment and emit an unpleasant odor. Patients can relieve bad breath by brushing their teeth once in the morning and once in the evening and chewing gum. 4. Indigestion: Poor digestion can lead to a large amount of food being retained in the stomach, and the prolonged storage of this food may harbor some bacteria and produce an odor that can cause bad breath. Patients can take oral domperidone as prescribed by the doctor to treat bad breath caused by indigestion. If you have bad breath symptoms, you should go to the hospital and ask your doctor for a clear diagnosis and proper treatment, and you should follow your doctor’s instructions on how to use the medication.