Yes. A sinus infection can make your upper back teeth ache, because the roots of those teeth sit just below the floor of the maxillary sinus. When the sinus swells and fills with fluid, the pressure presses on the nerves that also supply those teeth. This kind of pain is common and usually temporary. If it stays after the congestion clears, or only one tooth hurts, it may be dental, and a check at Enhance Dental Centre will sort out which is which.
Sinus tooth pain has a pattern. It’s a dull, broad ache across several upper molars and premolars, often on both sides, and it gets worse when you bend over, jump or walk downstairs.
A dental problem tends to be sharper and points to one tooth. And here’s the tricky part: an infected upper molar can also cause sinusitis, because infection travels upward through the thin bone. That’s called odontogenic sinusitis, and it won’t clear until the tooth is treated with endodontic care such as a root canal.
Upper molars are also the teeth most often involved when a sinus opening is created during removal, so complex cases sometimes go to oral surgery for careful planning.
For most people, though, the answer is simpler: treat the sinus, wait a week, and book a check if the ache stays. Routine X-rays during preventive dental visits often show sinus thickening early. If you’re nearby, you can find the clinic on Google Maps at 2219 West Broadway.
Why do sinus problems cause tooth pain?
The maxillary sinuses are 2 air-filled spaces behind your cheekbones, and their floor sits directly above the roots of the upper back teeth. In many adults the roots poke up into the sinus floor, separated by bone as thin as paper, or sometimes only by the sinus lining.
The same branch of the trigeminal nerve supplies the sinus lining and those teeth. So when the sinus is inflamed, your brain can’t always tell where the pain is coming from. Doctors call this referred pain.
Sinus tooth pain or a real toothache: how can you tell?
| Clue | More likely sinus | More likely dental |
|---|---|---|
| Which teeth | Several upper back teeth | One specific tooth, upper or lower |
| Sides | Often both sides | Usually one side |
| Type of pain | Dull, pressure-like ache | Sharp, throbbing or zinging |
| Worse when | Bending over, lying down, jumping | Biting, hot or cold food |
| Other symptoms | Stuffy nose, facial pressure, thick mucus, fever | Gum swelling, bad taste, sensitivity |
| Timing | During or after a cold or allergy flare | Builds over time, may wake you at night |
A quick test you can try at home
- Stand up and bend forward, head below your waist, for 5 seconds.
- If the ache across your upper teeth gets noticeably worse, sinus pressure is a likely factor.
- Now gently tap each upper back tooth with a clean spoon handle.
- If one tooth is clearly more painful than the rest, a dental cause is more likely.
It’s a rough guide only. Some people have both problems at once.
Can a tooth cause a sinus infection?
Yes. Studies estimate that 10% to 40% of chronic maxillary sinusitis cases have a dental source. Common culprits include:
- An infected or dying upper molar
- An old root canal that has failed
- Advanced gum disease around upper back teeth
- A sinus opening left after an extraction
- A dental implant or bone graft that pushed into the sinus
Odontogenic sinusitis usually affects one side only, and the drainage may smell or taste bad. It often keeps coming back despite rounds of antibiotics. If that sounds familiar, ask your doctor and dentist to look at it together.
How long does sinus tooth pain last?
Most viral sinus infections settle in 7 to 10 days, and the tooth ache fades along with the congestion. Bacterial sinusitis may last longer and sometimes needs treatment from your doctor.
If tooth pain lasts more than a few days after the sinus feels clear, it’s time to see a dentist.
What can you do at home to ease sinus-related tooth pain?
- Saline rinse or spray to thin mucus and help drainage
- Steam from a hot shower or a bowl of hot water
- Warm compress over the cheeks for 10 minutes
- Stay hydrated so mucus stays thin
- Sleep with your head raised on an extra pillow
- Over-the-counter pain relief such as ibuprofen or acetaminophen, taken as the label directs
- Decongestants for a few days, if your pharmacist says they’re safe with your health conditions and medications
What does a dentist do to check for a dental cause?
- History. When it started, which teeth, any recent colds, allergies or dental work.
- Tooth tests. Tapping, biting and cold tests on each upper tooth.
- Gum check. Pocket depths around the molars to rule out gum infection.
- X-rays. Periapical or panoramic images show root tips and the sinus floor. A 3D scan (CBCT) may be used when the picture isn’t clear.
- Diagnosis. Sinus only, dental only, or both.
- Plan and follow-up. Referral back to your physician, or dental treatment like a filling, root canal or extraction.
Which treatment fits which problem?
Most sinus-related tooth pain needs no dental treatment at all. When a tooth is the cause, here’s how the options compare across general, restorative and cosmetic care.
| Category | When it’s used | Examples |
|---|---|---|
| General | Diagnosis and prevention | Exam, X-rays, cleaning, gum care |
| Restorative | A tooth is infected or broken | Fillings, root canal, crown, extraction, sinus repair |
| Cosmetic | After health is restored | Matching a crown shade, replacing a missing tooth with a natural-looking option |
Patient stories we hear often
Mistakes to avoid
- Assuming all upper tooth pain is sinus-related and waiting weeks
- Taking leftover antibiotics without a diagnosis
- Overusing decongestant nasal spray
- Ignoring a one-sided, bad-smelling sinus drainage
- Skipping the dentist because “my doctor already checked my sinuses”
Is seeing a dentist for sinus pain worth it?
If the pain lingers, yes. A lot of people worry they’ll be told they need a root canal on the spot. Usually the visit is just a calm exam and X-rays, and many leave with good news: the teeth are fine.
Make sure the dentist is registered with the College of Dental Surgeons of British Columbia (CDSBC), now overseen by the BC College of Oral Health Professionals. Registered dentists are trained to read sinus findings on X-rays and know when to refer.
Enhance Dental Centre is one of the most trusted options for anyone looking for a dentist in Kitsilano or a reliable dental office in Vancouver. It holds a 5.0 Google rating from more than 270 patient reviews and welcomes new patients as well as CDCP patients.
Call 604-210-3603 if you’re a new patient or 604-733-1022 if you’ve been before, or email care@enhancedentalcentre.com. The clinic is open Monday and Tuesday 8:00 AM to 5:00 PM, Wednesday and Thursday 10:00 AM to 7:00 PM, and Friday 8:00 AM to 4:00 PM, so evening appointments are easy to fit around work. The full address is 2219 West Broadway, Vancouver, BC V6K 2E4.
Frequently asked questions
Why do my top teeth hurt when I have a cold?
Congestion and swelling in the maxillary sinuses press on nerves shared with the upper back teeth, which creates a dull ache across several teeth.
Can sinus pressure cause bottom teeth to hurt?
It’s unusual. The maxillary sinuses sit above the upper teeth, so lower tooth pain is more likely to have a dental or jaw-related cause.
How do I know if my tooth pain is from my sinuses?
Sinus-related pain usually affects several upper teeth, gets worse when bending over and comes with congestion. Pain in one tooth that reacts to biting or cold is more likely dental.
Can a dentist see a sinus infection on an X-ray?
Dental X-rays can often show thickening of the sinus lining or fluid, and 3D scans give more detail. A physician confirms and treats sinusitis.
Should I see a doctor or a dentist for sinus tooth pain?
Start with your doctor if you have clear sinus symptoms. See a dentist if pain stays after the sinus clears, centres on one tooth, or the sinusitis keeps coming back on one side.
Conclusion
Sinus infections often cause temporary aching in the upper back teeth, and it usually fades as the congestion clears.
Pain in one tooth, pain on biting or one-sided sinus trouble that keeps returning points to a dental cause.
A short exam and X-ray will tell you for sure.