Tooth brushing may still leave food particles in our mouth especially in between our teeth since toothbrush cannot clean the entire surface area of the teeth especially the cavities. These food particles will decompose. And like other decomposing matter on earth, food particles inside our mouth emit unpleasant odor. It might be due to some foods or beverages you have taken recently or certain medications for which the by products of decomposition are emanating through your mouth. But, what if yours is a chronic condition? What would you do? For one, bad breathe would not have been there if you were careful enough to observe proper oral hygiene. So if you want to stop bad breath, then avoid particular foods and drinks. Quit smoking, stop drinking coffee and soda, and avoid foods that can cause you that foul smell such as cabbage, onion, and garlic. Switch to tea. Eat fruits and vegetables that contain natural fiber. Also, you can make your own toothpaste and mouthwash. This is because bad breath causing bacteria originate from the posterior part of the tongue and only pushed forward once you speak. Thus you can never tell if you have bad breath or not only by smelling your own breath. Now, how can you tell if you have bad breath or not? The simplest way is by asking a 5-year old child. Bad breath is also associated with periodontal diseases such as tooth decay, gingivitis, and plaque. Often, cavities provide a venue for food particles to reside in the teeth that would further cause bad breath. 3. Nasal infection. This happens when a foreign object is stuck and infects in your child's nose. Maintaining a good oral hygiene can prevent bad breath A good oral hygiene starts the moment you develop your first set of teeth. Although you cannot bring back that time, it is not too late you to begin taking care of your teeth. A good oral hygiene means brushing your teeth after meal, flossing at least one a day (before you sleep), using oral antiseptic that does not dry your mouth, and visiting a dentist for at least once a year.