Reviewed By: Mike Malone, DDS

Bad breath, otherwise known as halitosis, is a very common oral health issue. People of most any age may suffer from halitosis, including:
Researchers have determined that bad breath typically originates during open-air interaction with bacteria in the mouth, the nose or the stomach.
There are numerous nasal triggers for bad breath. Nasal dysfunction, including a genetic abnormality in the nasal passage, may inhibit proper mucous flow. The bacteria found in sinusitis, post-nasal drip and allergies may pass from the nose to the back of the tongue where, if neglected, it can lie dormant due to improper saliva flow or poor dental hygiene.
Biologists have determined that numerous types of bacteria contribute to halitosis. Interestingly, all of these bacteria are found in other types of unpleasant odors, including corpse scent (a combination of oxygen and sulfur compounds and/or nitrogen-containing gases such as cadaverine), decayed meat (putrescine), rotten egg stench (hydrogen sulfide), smelly feet (isovaleric acid), as well as feces aroma (methyl mercaptan and skatole). When bacterial plaque is not removed from the teeth, gums, or in between the teeth, it continues to grow and ultimately may lead to halitosis, tooth decay and gum disease.
To think that such scents could be emanating from your mouth is unpleasant indeed, illustrating the importance of exercising proper dental hygiene and maintaining regular dental check-ups.

[Updated May 2008]
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