While allergies themselves don’t damage teeth, they can indirectly cause mouth problems. One of the most common oral health concerns you might experience is dry mouth. It often appears as a side effect of the antihistamines used to treat allergies or as a result of more frequent mouth breathing your allergies might cause.
Because dry mouth decreases saliva, it can damage teeth and gums. Saliva helps digest food, wash food particles off your teeth, neutralize cavity-causing acids from plaque and more. When you don’t have enough, your risk for tooth decay and periodontal (gum) disease increases.