Bad breath causes and cure

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Most bad breath or halitosis starts in your mouth, and there are many possible
causes. They include:
Food. The breakdown of food particles in and around your teeth
can increase bacteria and cause a foul odor. Eating certain foods,
such as onions, garlic, and other vegetables and spices, also can
cause bad breath. After you digest these foods, they enter your
bloodstream, are carried to your lungs and affect your breath.
Tobacco products. Smoking causes its own unpleasant mouth
odor. Smokers and oral tobacco users are also more likely to have
gum disease, another source of bad breath.
Poor dental hygiene. If you don't brush and floss daily, food
particles remain in your mouth, causing bad breath. A colorless,
sticky film of bacteria (plaque) forms on your teeth and if not
brushed away, plaque can irritate your gums (gingivitis) and
eventually form plaque-fil ed pockets between your teeth and gums
(periodontitis). The uneven surface of the tongue also can trap
bacteria that produce odors. And dentures that aren't cleaned
regularly or don't fit properly can harbor odor-causing bacteria and
food particles.
Dry mouth treatment. Saliva helps cleanse your mouth, removing
particles that may cause bad odors. A condition cal ed dry mouth --
also known as xerostomia (zeer-o-STOE-me-ah) -- can contribute
to bad breath because production of saliva is decreased. Dry mouth
naturally occurs during sleep, leading to "morning breath," and is
made worse if you sleep with your mouth open. Some medications
can lead to a chronic dry mouth, as can a problem with your
salivary glands and some diseases. Dry mouth remedy
Infections in your mouth. Bad breath can be caused by surgical
wounds after oral surgery, such as tooth removal, or as a result of
tooth decay, gum disease or mouth sores.
Other mouth, nose and throat conditions. Bad breath can
occasionally stem from smal stones that form in the tonsils and are
covered with bacteria that produce odorous chemicals. Infections or
chronic inflammation in the nose, sinuses or throat, which can
contribute to postnasal drip, also can cause bad breath.
Medications. Some medications can indirectly produce bad breath
by contributing to dry mouth. Others can be broken down in the
body to release chemicals that can be carried on your breath.
Other causes. Diseases, such as some cancers, and conditions such
as metabolic disorders, can cause a distinctive breath odor as a result
of chemicals they produce. Chronic reflux of stomach acids
(gastroesophageal reflux disease) can be associated with bad breath.

Bad breath in young children may be caused by a foreign body, such
as a small toy or piece of food, lodged in a nostril. Please visit our
website for more info.