Whats the best way to treat halitosis?

Brush and gargle: If this isn't enough get checked for sinus infection.Your dental health is good?

Multiple Answers: First find the cause and deal with that directly. Typically, bad breath stems from bacteria between teeth, on the tongue and around the gums. Fortunately, this problem is often easy to fix: good oral hygiene (brushing 2x day, flossing & brushing your tongue), regular visits to your dentist (to prevent gum disease), and ruling out any underlying conditions or other factors.