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Can Infected Sinuses Cause Toothache?

If your upper back teeth ache during a cold, you may be wondering: can infected sinuses cause toothache? Yes. A sinus infection, or sinusitis, often produces a dull ache in your upper molars and premolars. The pain feels like a dental problem, yet the source sits in the air spaces above your teeth. 

Knowing the difference helps you choose the right care and avoid missing a real dental infection.

How Your Sinuses and Upper Teeth Connect

Your maxillary sinuses sit behind your cheekbones, directly above your upper back teeth. The roots of your upper molars and premolars rest close to the floor of these sinuses. In some people, the roots extend into the sinus floor, with only a thin layer of bone or tissue between them.
The same nerves supply your sinus lining and your upper teeth. When your sinus lining swells, it presses on these nerves. Your brain reads the signal as tooth pain. Dentists call this referred pain, since you feel it away from its true source.

How Can Infected Sinuses Cause Toothache?

A cold, an allergy flare, or a bacterial infection inflames your sinus lining. The swollen tissue blocks drainage, and mucus builds up inside the sinus. Pressure rises and pushes down on the roots and nerves of your upper teeth. According to the Mayo Clinic, toothache is another sign and symptom of acute sinusitis. 

Sinus tooth pain has clear features:
  • A dull, constant ache instead of a sharp, sudden pain
  • Pain across several upper back teeth at once
  • Discomfort rising when you bend forward, climb stairs, or lie down
  • Tenderness in your cheeks, under your eyes, or around your nose

Signs Your Tooth Pain Comes From Your Sinuses

Tooth pain from a sinus infection rarely appears alone. Check for these symptoms alongside the ache:
  • A stuffy or blocked nose
  • Thick yellow or green nasal discharge
  • Postnasal drip or a sore throat
  • Pressure around your cheeks, eyes, or forehead
  • A reduced sense of smell
  • Headache, ear pressure, fatigue, or a mild fever
Tooth pain that eases as your congestion clears suggests a sinus source.

Signs Your Toothache Comes From a Dental Problem

Some toothaches mimic sinus pain but start inside the tooth or gums. A dental cause becomes more likely when you notice:
  • Sharp pain in one specific tooth
  • Pain when you bite or chew
  • Lingering sensitivity to hot or cold drinks
  • Swelling, a small bump, or a bad taste near your gums
  • Pain in your lower teeth, which sit far from your sinuses
  • Pain continuing after your sinus symptoms clear

These signs point to decay, a cracked tooth, gum disease, or an infected nerve. Our guide, How Do You Know If You Need a Root Canal?, explains the warning signs of nerve infection. 

The link also works in reverse. An infected upper tooth sometimes spreads bacteria into the sinus above it. Doctors call this odontogenic sinusitis. It affects one side and often returns after standard sinus treatment. An older root canal tooth also develops problems over time.

Treatment Options for Sinus Tooth Pain

Your treatment depends on the source of your pain.

Treatment for a Sinus Infection

Your physician treats the sinus infection, and your tooth pain fades as the swelling clears. Common treatments include:
  • Saline irrigation to clear mucus
  • Steroid nasal sprays to reduce swelling
  • Antibiotics for a confirmed bacterial infection
  • Allergy management if allergies trigger your sinus flares
  • Referral to an ear, nose, and throat specialist for chronic or repeated sinusitis

Treatment for a Dental Cause

If your dentist finds a tooth problem, treatment targets the tooth itself:

Treatment for Odontogenic Sinusitis

When an infected tooth causes your sinus infection, your dentist and physician work together. Your dentist treats the tooth first, often with a root canal or extraction. Your physician then treats any remaining sinus infection. Treating only the sinus leaves the source in place and allows the infection to return.

How to Relieve Sinus Tooth Pain at Home

Once you confirm a sinus link, these steps ease pressure on your teeth:
  • Rinse Your Nasal Passages: Use saline spray or a sinus rinse bottle. Use distilled or boiled and cooled water.
  • Use Steam Therapy: Breathe in steam from a warm shower.
  • Stay Hydrated: Drink plenty of water to thin mucus.
  • Apply a Warm Compress: Hold a warm compress over your cheeks for 10 minutes.
  • Raise Your Head While You Sleep: Sleep with your head raised on an extra pillow.
  • Choose Nonprescription Medicines Carefully: Take a nonprescription pain reliever or decongestant as directed on the label. Ask your pharmacist first if you have high blood pressure or take other medicines.
  • Limit Decongestant Nasal Sprays: Limit decongestant nasal sprays to three days. Longer use worsens congestion.

When to See a Dentist or Doctor

Book a visit if you notice:
  • Tooth pain lasting more than 10 days
  • A high or lasting fever
  • Swelling in your face or gums
  • Pain focused on one tooth
  • Symptoms returning after a period of improvement
  • Repeated sinus infections on the same side
Seek urgent medical care for vision changes, confusion, a stiff neck, or swelling around your eyes. 

Conclusion

Can infected sinuses cause toothache? Yes, through pressure on the nerves your sinuses share with your upper back teeth. Congestion, facial pressure, and a dull ache across several teeth point to a sinus source. Sharp pain in one tooth, pain when biting, or gum swelling point to a dental problem. Home care can ease sinus pressure, but lasting pain calls for an exam. 

Book Your Tooth Pain Exam in Brookline, MA

Your tooth pain deserves a clear diagnosis. The dentists at Brookline Smile Artists examine your teeth, review your symptoms, and identify whether your pain starts in your sinuses or your teeth. Call (617) 982-2980 or request an appointment online. Visit us at 209 Harvard Street, Suite 402, Brookline, MA 02446.

FAQs About What to Eat After Teeth Removal

Can infected sinuses cause toothache in lower teeth?

Rarely. Your maxillary sinuses sit above your upper teeth, so sinus pressure affects your upper molars and premolars. Pain in your lower teeth points to a dental cause, such as decay, gum disease, or a wisdom tooth problem.
Yes. An infection in one maxillary sinus produces pain on the same side. One-sided pain with a single sensitive tooth calls for a dental exam, since an infected tooth can trigger sinusitis on the same side.
Sinus tooth pain eases as your sinus infection clears. Most viral sinus infections improve within 7 to 10 days. Pain lasting longer needs an exam by your dentist or doctor.
Sinus pressure usually causes a dull ache rather than temperature sensitivity. Sharp, lingering pain from cold drinks points to a problem inside the tooth, such as decay or nerve inflammation.
Antibiotics treat bacterial sinus infections only. Viruses cause most sinus infections, and antibiotics do not help them. Your physician decides whether you need antibiotics based on your symptoms and how long they last.
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If you are looking for a dentist in Brookline, MA, schedule your consultation with the team at Brookline Smile Artists. We offer Cosmetic and Restorative Dentistry. We are located at 209 Harvard Street, Suite 402 in Brookline. Our office hours are Monday through Thursday from 7:30 AM to 5:30 PM and Friday from 8:00 AM to 2:00 PM.

Medically Reviewed By
Gary R. Login, ABOI/ID

One of the top rated dentists in Brookline, MA

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