What is the cause of bad breath?

Bacteria: The most common cause of bad breath is the bacteria that live between the papillae of the tongue. Stomach disorders can also add nasty odors to the mix as well as the bacteria that cause gum disease.

Many causes: Bad breath can be caused by various conditions. Food which begins breakdown in the mouth eventually is broken down enters the bloodstream carried to your lungs and finally given off in your breath. Poor oral hygiene leading to gum disease adds to halitosis. Smoking and tobacco chewing can cause it as well. Finally medical conditions such as diabetes, liver and kidney disease can cause halitosis.