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Infections in the mouth, such as dental caries (tooth decay), periodontal (gum) disease or mouth sores related to other conditions may contribute to bad breath.
Persistent bad breath or a bad taste in the mouth may be a warning sign of gum (periodontal) disease. Gum disease is caused by the buildup of plaque on teeth.
Dry mouth also can cause bad breath.
Smoking or chewing tobacco-based products also can cause bad breath,
You may need deep cleaning & fill tooth cavities with artificial enamel filling. Rinse your mouth thoroughly with a mouth wash until then.
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