What causes mouth smelling
Biology
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Answer
Bad breath, or halitosis, is most commonly caused by poor oral hygiene. When food particles are not removed from the mouth through brushing and flossing, bacteria break them down, releasing sulfur compounds that smell unpleasant.
Other causes include:
- Certain foods: Garlic, onions, and spices can cause temporary bad breath.
- Dry mouth: Saliva helps cleanse the mouth; reduced saliva flow (xerostomia) can lead to odor.
- Tobacco products: Smoking and chewing tobacco leave their own unpleasant smell and dry out the mouth.
- Medical conditions: Infections in the throat, nose, or sinuses, as well as conditions like acid reflux, diabetes, or liver/kidney problems, can sometimes manifest as bad breath.
- Dental issues: Gum disease, cavities, and poorly fitting dental appliances can harbor bacteria.
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