Morning time - Saliva almost stopped during sleep and its cleaning effect weakened causing the bacteria to grow and cause bad breath.
Certain foods - garlic, onions and other foods containing odor causing compounds - enter the bloodstream; they are transferred to the lungs and exhaled there.
Poor oral hygiene habits - Food particles that remain in the mouth promote bacterial growth.
Periodontal (gingival) disease - A colony of bacteria and food debris that reside under the inflamed gums.
Improper installation of dental holes and dental appliances - can also cause bad breath.
Xerostomia - May be caused by certain medications, salivary gland problems or persistent mouth breathing.
Tobacco products - Dry mouth, causing bad breath.
Dieting - When the body burns fat, certain chemicals called ketones are released in the breath.
Dehydration, hunger and missed diets - drinking water and chewing foods increase saliva flow and remove bacteria.
Certain medical conditions and diseases - diabetes, liver and kidney disease, chronic sinus infections, bronchitis and pneumonia are several conditions that cause bad breath.
