Bad breath can have causes that aren't due to underlying disease. Examples include poor dental hygiene, dehydration, or recently eating certain foods like onions or garlic. The most common cause of halitosis is bad oral hygiene. If particles of food are left in the mouth, their breakdown by bacteria produces sulfur compounds. Keeping the mouth hydrated can reduce mouth odor. The best treatment for bad breath is regular brushing, flossing, and hydration.
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