Many rumors circulate from time to time about the cause of chronic bad breath, or halitosis.
Scrape the area with a plastic spoon and if you see a yellowish discharge, this is area that needs attention. Although the postnasal drip doesn t have an odor when it first reaches the tongue, it develops one as it sits there. You may find this procedure uncomfortable due to the fact that it triggers the gag reflex, but in time this subsides. After ruling out the mouth, the tongue and infected teeth, the next area to investigate is the nose and the nasal passages. If a person is suffering from sinusitis or another bacterial infection, a blockage of the airway or dry nasal mucous it can lead to bad breath.