According to LessWrong, your allergies might be sabotaging your teeth in unexpected ways. Here's how: seasonal congestion triggers mouth breathing, especially at night. Dry mouth follows—and that's the problem, since saliva is essential for remineralizing teeth and preventing cavities. If you're developing cavities despite solid oral hygiene, look for warning signs like waking with dry mouth or persistent nasal stuffiness. The post suggests treating the root cause: manage allergies through air filtration and antihistamines, then reinforce nasal breathing with myofunctional therapy exercises that strengthen jaw and airway muscles. Some also use mouth tape at night to maintain oral moisture. It's an overlooked but surprisingly common contributor to cavity risk.

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