Halitosis, colloquially called
bad breath, or
fetor oris, is a
symptom in which a noticeably unpleasant
odor is present on the exhaled breath. Concern about halitosis is estimated to be the third most frequent reason for people to seek
dental care, following
tooth decay and
gum disease;
[1] and about 20% of the general population are reported to suffer from it to some degree.
Not all who think they have halitosis have a genuine problem. Of those who feel they have halitosis, significant percentages (5‑72%)
[2] have been reported to have no genuine halitosis when professionally examined. Of those who have genuine halitosis, often the odor is caused by
bacteria present below the
gumline and on the back of the
tongue. The remaining 10% is accounted for by many conditions, including disorders in the
nasal cavity,
sinuses,
throat,
lungs,
esophagus,
stomach or elsewhere. See the related article on
tonsilloliths for another possible cause of halitosis.
Very rarely, halitosis can be one of many symptoms of a serious underlying medical condition such as
liver failure; but, in the vast majority of cases, the cause is minor and can often be reduced by adjustments to
oral hygiene, including brushing or gently scraping the back of the tongue and improving the health of the gums by using
dental floss. Occasionally, however, especially if the origin of the odor is not in the mouth, halitosis can be more difficult to
diagnose and to manage successfully. Bad breath is a social
taboo; and, as a result, perceived or genuine halitosis can sometimes trigger
social anxiety and
depression.
I'm starting to feel bad for the guy. Imagine walking around with that.