It's normal to have bad breath sometimes. Hunger, menstruation and certain drugs that dry the mouth can contribute to foul breath.
Foul breath can be a symptom of a sinus infection, gum disease, diabetes or liver disease.
In most cases, however, experts say the source of bad breath is located in the mouth. Chronic sufferers of bad breath should ask their clinician about new mouthwashes and toothpastes that neutralize the odor-causing gases in the mouth. When used in combination with a tongue-scraper, this regimen can treat halitosis successfully. Although every effort has been made to ensure that data is current, please note that some information may be outdated by more recent medical developments. This information is meant as an educational starting point, and is not a substitute for personal consultation with your own physician.