Bad breath may be caused by a decrease in saliva. The flow of saliva in the morning almost stops during sleep. The reduced cleaning action of the saliva allows bacteria to grow, causing bad breath, halitosis, fetor oris, ozostomia, or stomatodysodia.
While some people are hungry, bad breath is more common. It is common in people who miss meals or are dieting. Chewing foods increase saliva in the mouth. When you are not eating, saliva decreases and bacteria growth increases, causing bad breath.

The same when you are dehydrated. Dentists tell us that when you are dehydrated, you do not produce much saliva. The reduced cleaning action of the saliva allows bacteria to grow, causing bad breath.

It can also be caused by diseases that affect the salivary glands, such as Sjögren’s syndrome or scleroderma. Bad breath may also result when you are taking certain medicines or after drinking alcoholic beverage…liver failure and kidney disease.

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