Most bad breath problems begin in the mouth, and are a result of poor dental hygiene. Persistent bad odor from the mouth is indicative of the presence of bacteria that coat the teeth and gums. Food particles lodged in the cavities and back of the tongue decay and release sulfur compounds, which cause of bad breath. In order to stop bad breath, one must follow a proper cleaning regimen that includes brushing regularly, flossing, and rinsing with mouthwash.

Brushing the teeth, gums, and tongue is recommended after every meal, to prevent the buildup of bacteria which feed on decaying food particles. Several types of toothpaste are available in the market today, ranging from regular toothpaste to brands that provide extra care for sensitive gums and teeth. Many dentists suggest the use of fluoride-based toothpaste, as fluoride is a poison that kills bacteria.

Brushing dentures with ordinary toothpaste can result in discoloration and scratches on the surface. It is therefore essential to clean them with either soap or lukewarm water, or specially manufactured denture creams and brushes. It is also advisable to thoroughly clean the area that fits against the gums and teeth. This will prevent plaque buildup on the dentures and keep them fresh and clean.

Mouthwashes tend to disguise bad breath instead of curing or preventing it. In fact, some conventional mouthwashes leave our mouth dry and thereby make it more hospitable to bacteria. Chlorine-dioxide-based mouthwashes are the latest in bad breath prevention. These mouthwashes attack the sulfur compounds responsible for bad odor. The simplest way to rinse the mouth, dislodge food particles, and stimulate saliva flow is by drinking water.

For those who cannot brush after meals or snacks, chewing sugarless gum is advised. The chewing action prevents the mouth from becoming dry by stimulating saliva flow, which in turn cleans the mouth and dissolves sulfur compounds.