20 doctors weighed in:

What are causes of bad breath?

20 doctors weighed in
7 doctors agree

In brief: Bacteria on tongue

Bad breath is most often produced by bacteria in at the back of the tongue.
The stomach rarely results in bad breath except when there are specific digestion issues. Cleaning teeth, including inbetween, and the back of the tongue with a tongue cleaner often helps reduce bad breath.

In brief: Bacteria on tongue

Bad breath is most often produced by bacteria in at the back of the tongue.
The stomach rarely results in bad breath except when there are specific digestion issues. Cleaning teeth, including inbetween, and the back of the tongue with a tongue cleaner often helps reduce bad breath.
Dr. Jennifer Holtzman
Dr. Jennifer Holtzman
Thank
6 doctors agree

In brief: Many causes

Many things can cause bad breath, including cavities in your teeth, periodontal problems, acid reflux, sinus infections, and diet.
Since you cannot be evaluated for all of these conditions over the internet, seek the care of a local dentist and physician who can examine you and treat you.

In brief: Many causes

Many things can cause bad breath, including cavities in your teeth, periodontal problems, acid reflux, sinus infections, and diet.
Since you cannot be evaluated for all of these conditions over the internet, seek the care of a local dentist and physician who can examine you and treat you.
Dr. Theodore Davantzis
Dr. Theodore Davantzis
Thank
2 doctors agree

In brief: Good Hygiene 1st.

If you already have a good oral hygiene routine, it could be dehydration make sure to drink plenty of water. Eating desserts at night before bed and not brushing your teeth can show up as bad breath in the morning.
A whole list of medical conditions also cause bad breath, diabetes is the most common.

In brief: Good Hygiene 1st.

If you already have a good oral hygiene routine, it could be dehydration make sure to drink plenty of water. Eating desserts at night before bed and not brushing your teeth can show up as bad breath in the morning.
A whole list of medical conditions also cause bad breath, diabetes is the most common.
Dr. Hetesh Ranchod -- Dr. Ranch
Dr. Hetesh Ranchod -- Dr. Ranch
Thank
Dr. James Beck
Dentistry
2 doctors agree

In brief: Multiple factors

Gingivitis and periodontal disease are the main culprits.
Also food left between the teeth from not brushing and flossing. And plaque left on the teeth can cause bad breath. I think one thing people fail to do is brush their tongue. The tongue is like a thick carpet collecting bacteria and odors. See your dentist to check for periodontal disease, brush, floss, and brush the tongue.

In brief: Multiple factors

Gingivitis and periodontal disease are the main culprits.
Also food left between the teeth from not brushing and flossing. And plaque left on the teeth can cause bad breath. I think one thing people fail to do is brush their tongue. The tongue is like a thick carpet collecting bacteria and odors. See your dentist to check for periodontal disease, brush, floss, and brush the tongue.
Dr. James Beck
Dr. James Beck
Thank
1 doctor agrees

In brief: Multiple Answers

First find the cause and deal with that directly.
Typically, bad breath stems from bacteria between teeth, on the tongue and around the gums. Fortunately, this problem is often easy to fix: good oral hygiene (brushing 2x day, flossing & brushing your tongue), regular visits to your dentist (to prevent gum disease), and ruling out any underlying conditions or other factors.

In brief: Multiple Answers

First find the cause and deal with that directly.
Typically, bad breath stems from bacteria between teeth, on the tongue and around the gums. Fortunately, this problem is often easy to fix: good oral hygiene (brushing 2x day, flossing & brushing your tongue), regular visits to your dentist (to prevent gum disease), and ruling out any underlying conditions or other factors.
Dr. Thomas Cosgrove
Dr. Thomas Cosgrove
Thank
Get help from a real doctor now
Dr. Aaron Milstone
Board Certified, Internal Medicine - Pulmonology
23 years in practice
1M people helped
Continue
108,000 doctors available
Read more answers from doctors