To prevent bad breath, practice good oral hygiene and make lifestyle adjustments:

• Brush your teeth at least twice a day and floss daily to remove food particles and plaque.
• Clean your tongue with a brush or tongue scraper, especially focusing on the back.
• Stay hydrated by drinking water frequently to wash away bacteria.
• Avoid smoking and using tobacco products and seek help from your dentist to quit.
• Use mouthwash or antiseptic rinses to reduce bacteria and freshen breath, but avoid relying on them solely to mask odor.

Additionally, visit your dentist at least twice a year for check-ups and cleanings. If bad breath persists despite good oral care, your dentist may refer you to a physician to explore other underlying health issues.