9. Tooth Decay and Gingivitis

When your teeth is weakened and the enamel erodes, tiny holes can end up forming on them. As a result food particles get stuck in them. As your regular brushing routine will probably be unable to get rid of such materials, they end up decaying and growing bacteria. Not only can this cause infections, it also makes your breath smell really bad.

Gingivitis, a condition where the gums become inflamed due to a bacterial infection, can also be the cause of halitosis. Not only is this unpleasant, it can cause immense pain, and even tooth loss!