Bad breath is mainly a social problem. But it can also be an indicator of a health problem, so you should determine its cause.
Most bad breath is caused by bacteria on or around the mouth.
Now dentists have the knowledge and tools to provide patients with effective therapies and products to address this important oral health issue. Brush your teeth twice daily with an ADA-accepted fluoride toothpaste, and floss daily. Brush your tongue daily, too. Schedule regular dental checkups and professional cleanings. If you think you have constant bad breath, keep a log of the foods you eat.