Bad breath medically called halitosis is an unpleasant odor of the mouth. It is mainly caused by the build-up of bacteria in the mouth which produces a foul smell. Bad breath can be embarrassing and may even cause anxiety. Bad breath can result from food tobacco products poor dental hygiene health problems dry mouth oral infections dental problems or medications. The saliva help keep your mouth hydrated. The antibacterial substances present in the saliva also protects your teeth from cavities prevents food from sticking to your teeth and recuses risk of getting gastroesophageal reflux disease (GERD). Apart from bad breath