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3 min read

September 1, 2026

How Cold & Flu Season Impacts Oral Health

Before cold and flu season hits, learn what it could mean for your smile and how to protect your oral health while you recover.

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Sep 1
3 min read

As the days grow shorter and fall settles in, cold and flu season is not far behind. From the common cold to stomach bugs, it is hard to avoid coming down with something over the colder months. Taking care of your entire body, including your mouth, while you are sick is key to a successful recovery. Read on to learn about common oral health issues that arise during cold and flu season, along with tips to manage your symptoms and keep your smile healthy this fall.


Tooth Pain  

If you have ever noticed tooth pain along with a stuffy nose, you are not alone. This occurs because some of your tooth roots are located just below the sinus cavity. When your sinuses become inflamed or congested, they put extra pressure on the underlying tooth roots, resulting in discomfort. This pain is often described as dull and continuous, and it may intensify when you move your head. Once you recover from your illness, the pressure lifts and the pain subsides. However, if the pain continues after you recover, schedule a dental exam to determine the cause. 


Dry Mouth 

Dry mouth is an uncomfortable side effect of congestion from a cold or flu. When your sinuses are blocked, it is natural to default to mouth breathing, and many cold medications can dry out your mouth even further. Together, these factors make it difficult to maintain healthy saliva flow, which is essential for washing away harmful bacteria and food particles. Prolonged dry mouth can increase the risk of cavities, gum disease, and other oral health issues. Stay hydrated and drink plenty of liquids when you are sick. This will help counteract the harmful effects of dry mouth and keep your mouth moist. 


Bad Breath 

When you are feeling under the weather, you may notice your breath smelling more sour than normal. Bad breath, clinically known as halitosis, is common with congestion. Mucus creates an ideal environment for bacteria to thrive and reproduce. Post-nasal drip can cause this bacteria-laden mucus to accumulate in the back of the throat. This causes not only unpleasant-smelling breath, but also a white coating on the tongue. Staying well hydrated, taking hot showers, and treating congestion with over-the-counter medication can help reduce the odor caused by post-nasal drip. 


Enamel Erosion  

If you come down with a stomach bug this season, your enamel could take a hit without you realizing it. Vomiting exposes the teeth to acidic stomach fluids. When this acid lingers on the teeth, it increases enamel decalcification, leading to erosion and tooth decay. Although it is a natural impulse to reach for your toothbrush immediately after throwing up, doing so can actually cause more wear on the tooth surfaces. Rinse your mouth immediately with water or mouthwash, then wait about 30 minutes before brushing, so the acids have time to neutralize. 


Quick Tips for a Healthy Mouth This Cold & Flu Season 

  • Stay hydrated to combat dry mouth and maintain a healthy saliva flow.  

  • Replace your toothbrush after you recover to avoid reinfection.  

  • Rinse with water or mouthwash after vomiting, and wait at least 30 minutes to brush.  

  • Choose sugar-free cough drops and cold medicine when possible to protect your tooth enamel.  

  • Keep up with regular brushing and flossing, even when you are not feeling your best. 

  • See your dentist if tooth pain or bad breath lingers after you have recovered. 


Feel Better Soon! 

Cold and flu season can take a toll on your body, including oral health. By staying hydrated, practicing good oral hygiene, and watching for symptoms like tooth pain or bad breath, you can protect your smile while you get better. If any of these issues linger after you recover, do not hesitate to reach out to your dental team. We can help determine the root cause of your symptoms and get your oral health back on track. 

 
 
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