Hello. Many people have bad breath(HALITOSIS) and its a common problem.  It can be caused due to plenty of reasons including cavities(CARIES)in mouth, no maintenance of oral hygiene, gum(GINGIVAL) disease, GASTROINTESTINAL PROBLEMS like acid reflux etc. You need to adopt certain ways to treat this problem:- 1)Rince your mouth with any mouthwash after each and every meal. 2)AVOID taking beverages. 3)Drink plenty of water. 4)FLOSS your teeth every day without fail. 5)Brush your teeth twice a day and cleanse your tongue making sure that debris gets removed from  the tongue surface.

Hie..if u have cleaned teeth still foul smell comes from mouth then stomach issue could be the reason....frequent acidity may be reason...if have this issue then take rabforce sr empty stomach ...and avoid acid forming fruits or food....