It might feel harmless: you’re tired, it’s late, and skipping your toothbrush for one night seems like no big deal. But that simple choice can quietly set off a chain of events inside your body that you may not notice until it’s too late.

When you fall asleep without brushing, millions of bacteria in your mouth start feeding on leftover food particles and sugars. Overnight, without the natural cleansing power of saliva (which decreases during sleep), those bacteria multiply, releasing acids that erode enamel, inflame gums, and create the perfect conditions for infection.

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