Seasonal Allergies and Oral Health Seasonal allergies can have a surprising impact on your oral health. Symptoms like dry mouth, sinus pressure, and mouth breathing can increase your risk of cavities and gum problems. Managing seasonal allergies and maintaining good oral hygiene can help protect your smile during allergy season. How Seasonal Allergies Affect Oral Health Seasonal allergies, especially common during spring allergies, trigger inflammation in the sinuses and nasal passages. This can lead to ...