By Roysten Xavier - June 29, 2026
Why Bad Breath (Halitosis) Happens
Bad breath originates from several sources:
|
Source |
Cause |
|
Mouth |
Bacteria breaking down food particles and dead cells |
|
Gums |
Gum disease (periodontitis) producing sulfur compounds |
|
Tongue |
Bacteria-coated tongue — the #1 cause of bad breath |
|
Dry mouth |
Reduced saliva = bacteria multiply faster |
|
Stomach/gut |
Acid reflux, gut imbalance |
|
Lungs |
Certain foods, alcohol, ketosis |
|
Nose/sinuses |
Post-nasal drip, sinus infections |
|
Systemic disease |
Diabetes, kidney disease, liver problems |
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