Could your sinus infection actually be a tooth problem?

Posted on October 1, 2026 in Healthy You

Your upper back teeth sit directly below your maxillary sinuses. That close relationship means inflammation, pressure or infection in that area can sometimes travel between your teeth and sinuses. This can make it hard to determine the source of the problem.^1,2

Tooth and sinus infections, although they can occur nearby each other, are different:

• A tooth infection (also called a dental abscess) develops when bacteria enter a tooth and reach the nerve. This can cause pain, swelling and sensitivity.²
• A sinus infection happens when the lining of the sinuses becomes inflamed, leading to congestion, facial pressure and discomfort.²

Sometimes, bacteria from a dental infection or advanced gum disease may cause sinus issues. On the flip side, swollen sinus tissue can press against nearby teeth and cause tooth pain.^1,2

Tooth problem or sinus problem? Here are some clues

Only a dental or medical professional can diagnose the underlying cause of your pain, but certain symptoms may offer hints.

It’s more likely a dental issue if you notice:¹

• Pain focused around one tooth
• Sensitivity to hot, cold or chewing
• Gum swelling or tenderness

It’s more likely a sinus-related if you notice:¹

• Pressure across several upper teeth at once
• Facial fullness or cheek pain
• Nasal congestion or a runny nose
• Pain that worsens when you bend forward

Sometimes symptoms overlap, which is why it’s important not to ignore pain that sticks around. Getting to the root cause will help avoid the infection from getting worse, so call your dentist or doctor if pain won’t go away.^1,2

Protect your mouth and sinus health

A few daily habits can help reduce harmful bacteria and support overall wellness:²

• Brush twice a day with fluoride toothpaste
• Floss once daily to remove plaque between teeth
• Ask your dentist whether an antimicrobial mouthwash is right for you
• Drink plenty of water to support saliva production
• Avoid smoking and other irritants that can affect both your mouth and sinuses
• Have twice yearly preventive dental exams

Don’t wait to make the call

If you have upper tooth pain along with congestion, facial pressure or other unusual symptoms, contact your dentist. A dental exam may help identify whether the issue is oral, sinus-related or something else entirely. Getting answers early will help you feel better faster and avoid complications, such as a worsening infection.^1,2

Need help finding dental care? Delta Dental of Iowa’s online Find a Provider tool can help you connect with an in-network dentist near you.

REFERENCES:

1. UT Health San Antonio. (2023, May 2). Sinusitis, dental infection or both. https://news.uthscsa.edu/sinusitis-dental-infection-or-both/
2. Delta Dental. The link between tooth and sinus infections. https://www.grinmag.com/2025-news/the-link-between-tooth-and-sinus-infections/

This content is for educational and informational purposes only and is not intended as medical advice. Please consult your dentist, physician, or other qualified healthcare professional for advice about your specific health needs.