3 doctors weighed in:
What causes halitosis?
3 doctors weighed in

Dr. Greg Rubin
Dentistry
In brief: Anaerobic bacteria
Bad breath is caused by billions of bacteria in your mouth, the same bacteria also may cause gum desease.
The reason it smells is bacause those bacteria produce gases and other waste in your mouth, and when you exhale, people around you may smell this very characteristic smell.

In brief: Anaerobic bacteria
Bad breath is caused by billions of bacteria in your mouth, the same bacteria also may cause gum desease.
The reason it smells is bacause those bacteria produce gases and other waste in your mouth, and when you exhale, people around you may smell this very characteristic smell.
Dr. Greg Rubin
Dr. Greg Rubin
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Dr. David Stall
Dentistry
In brief: Many things
First, gum disease can create bad breath due to bacterial infections resulting in accumulations of debris, plaque, and tartar.
Another source of bad breath is from your diet. If you have a diet with much garlic, onion, and other spices regularly, it can "repeat". In addition, if you have not cleaned your tongue a lot of food debris and bacteria can stick to your tongue and cause bad breath.

In brief: Many things
First, gum disease can create bad breath due to bacterial infections resulting in accumulations of debris, plaque, and tartar.
Another source of bad breath is from your diet. If you have a diet with much garlic, onion, and other spices regularly, it can "repeat". In addition, if you have not cleaned your tongue a lot of food debris and bacteria can stick to your tongue and cause bad breath.
Dr. David Stall
Dr. David Stall
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Dr. Randolph Todd
Dentistry - Endodontics
In brief: Bacteria
Halitosis or "bad breath" is a condition that may be due to a variety of causes.
Sometimes it is related to poor oral hygiene and an accumulation of bacteria around the teeth and on the tongue. These bacteria produce byproducts of metabolism that cause the odors. However halitosis may also be a result of a systemic disease. It is best to see your dentist to correctly determine the origin.

In brief: Bacteria
Halitosis or "bad breath" is a condition that may be due to a variety of causes.
Sometimes it is related to poor oral hygiene and an accumulation of bacteria around the teeth and on the tongue. These bacteria produce byproducts of metabolism that cause the odors. However halitosis may also be a result of a systemic disease. It is best to see your dentist to correctly determine the origin.
Dr. Randolph Todd
Dr. Randolph Todd
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