Bad breath, also called halitosis, is generally caused by a buildup of bacteria or debris inside the mouth. For some people, this odor-causing buildup occurs on the back portion of the tongue. However, it is not always clear why this tongue buildup occurs.
Possible causes of tongue-based bad breath may be due to postnasal mucus dripping from the nose to the throat, which forms a whitish coating. This coating often contains many different forms of bacteria which may thrive on the tongue's rough surface and cause unpleasant odors in the mouth…
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