Morning time:
Saliva flow almost stops during sleep and its reduced cleansing action allows bacteria to grow, causing bad breath
Certain foods:
Garlic, onions, etc. Foods containing odor-causing compounds enter the blood stream; they are transferred to the lungs, where they are exhaled.
 Poor oral hygiene habits:
Food particles remaining in the mouth promote bacterial growth.
Periodontal (gum) disease:
Colonies of bacteria and food debris residing under inflamed gums.
Dental cavities and improperly fitted dental appliances:
May also contribute to bad breath.
Dry mouth (Xerostomia):
May be caused by certain medications, salivary gland problems, or continuous mouth breathing.
Tobacco products:
Dry the mouth, causing bad breath.
Dieting:
Certain chemicals called ketones are released in the breath as the body burns fat.
Dehydration, hunger, and missed meals:
Drinking water and chewing food increases saliva flow and washes bacteria away.
Certain medical conditions and illnesses:
Diabetes, liver and kidney problems, chronic sinus infections, bronchitis, and pneumonia are several conditions that may contribute to bad breath.
Keeping a record of what you eat may help identify the cause of bad breath. Also, review your current medications, recent surgeries, or illnesses with your dentist.
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