7. Digestive Issues

A person with digestive problems will find it difficult to properly process the food they eat, and this can cause a whole lot of problems, including bad breath. In conditions like GERD (Gastroesophageal Reflux Disease), and acid reflux, the food doesn’t go through the proper digestive channels. As a result improperly digested food can decay, or even regurgitate, both of which can cause halitosis. Common GERD symptoms include a combination of bad breath, teeth acid erosion, and throat inflammation.

Another digestive issue that can affect breath is stomach ulcer. The Lournal of Medical Microbiology states that a bacteria called H.pylori which causes ulcers in the stomach can also cause bad breath. In fact, breath tests are one of the ways to test for the bacteria.