10 surprising causes of bad breath you didn’t know

3. Bad Bacteria Will Make Your Breath Smell

You may be surprised to learn that your mouth is home to both good and bad bacteria. The bad bacteria is one of the causes of bad breath, and studies show that one in particular, H. Pylori, is linked to halitosis. Since it mostly lives on the tongue, make sure you brush your tongue each time you brush your teeth. If you can, brush more than 2 or 3 times per day.