The Causes of Bad Breath
What you eat affects what you breathe out. Certain foods, such as garlic and onions, contribute to objectionable breath odor and even dieters may develop unpleasant breath from infrequent eating. If you don’t brush and floss daily, particles of food remain in the mouth, collecting bacteria, which can cause bad breath. Bad breath can also be caused by dry mouth (xerostomia) which occurs when the flow of saliva decreases.
One of the reasons why its especially important to talk to your dentist about bad breath is that it may be a sign of an underlying medical problem such as respiratory tract infection or gastrointestinal problems. Persistent bad breath or a bad taste in the mouth can also be a warning signs of gum disease. Smoking can also cause bad breath, stain teeth and reduce your ability to taste foods.