Sir, I have done it beforeBrush twice daily with Colgate Total Action toothpaste, use tongue cleaner, and change brush every 3 months. 2.) Use dental floss regularly. 3.) Keep the mouth moist by regularly drinking water, or keeping non-sugar edible item in mouth to keep the saliva flowing. 4.) Avoid smoking and tobacco. 5.) Use Listerine mouthwash twice daily. 6.) Avoid food causing bad smell. Eg- Garlic, onions. But its not working. Still I feel bad breath very badly. How can I get prevention from bad breath? Am I need any surgery? Please Sir give me a solution.