Halitosis or bad breath can be caused by several factors. It can be due to inadequate or improper dental regimens, diet or other lifestyle factors, or a sign of more serious health problems. It can also be caused by poorly fitted dental appliances, cavities, and oral yeast infections.
Generally persistent bad breath is accompanies by a bad taste in the mouth. It is usually a warning of gum or periodontal disease. When plaque is allowed to accumulate on teeth, bacteria will grow to the point that they will form toxins. These toxins will then irritate the gums. If left untreated, it will result in serious problems with not only the gums, but the underlying bone structure as well.