Teeth can hurt when you’re sick because sinus pressure presses on the roots of upper teeth, or from dental problems. See a dentist if it persists.
Why
- Sinus pressure on upper tooth roots.
- Teeth grinding while ill.
- Dry mouth from mouth breathing.
- Fever or dehydration.
How to tell
Several upper teeth ache when you bend over. Sinus pain.
Relief
- Decongestants and saline.
- Warm compress.
- Fluids.
See a dentist
If a single tooth hurts or pain lingers after recovery.
Sinus and congestion
When you have a cold, flu or sinus infection, swollen sinuses press on the roots of the upper teeth, causing dull, aching pain in several upper teeth at once. This is referred pain, and the teeth are not damaged.
Fever and inflammation
Illness increases inflammatory chemicals in the body, which can sensitize nerves and make teeth feel sore. Fever may also cause general aches, including jaw pain.
Dehydration and dry mouth
Illness and mouth breathing dry out the mouth. Saliva protects teeth, and without it, teeth may feel sensitive and cavities can form.
Teeth grinding
Congestion and poor sleep can increase clenching or grinding.
Medications
Decongestants and antihistamines dry the mouth. Sugary cough drops and syrups can raise cavity risk.
Vomiting
Stomach acid from vomiting erodes enamel, leading to sensitivity. Rinse with water or baking soda solution afterwards, and wait 30 minutes before brushing.
How to tell
Sinus related pain affects several upper back teeth on both sides, worsens when bending forward, and eases as the sinus infection improves. Dental pain affects one tooth, is sharp or throbbing, and worsens with hot, cold or biting.
Relief
- Drink fluids.
- Use a saline rinse or steam to relieve congestion.
- Take acetaminophen or ibuprofen.
- Use a warm compress on the cheeks.
- Maintain brushing and flossing.
- Choose sugar free lozenges.
Dental visit
See a dentist if pain continues after the illness resolves, if one tooth is affected, or if there is swelling, fever or a bad taste. Persistent facial pain and congestion over 10 days may be a bacterial sinus infection that needs a doctor.
Why teeth ache with illness
Sinus infections can cause upper back teeth to ache because the roots of those teeth sit close to the maxillary sinuses. Congestion and pressure feel like tooth pain even when the teeth are healthy. Fever and dehydration can reduce saliva and make teeth sensitive. Nausea and vomiting expose teeth to stomach acid, which can irritate enamel.
What to do
Treat the cold or sinus problem, stay hydrated and use saline rinses. Use pain relievers as directed on the label. If the pain continues after the sickness ends, is limited to one tooth, or comes with swelling, see a dentist. After vomiting, rinse with water and wait 30 minutes before brushing to protect enamel.
Based on data from the American Dental Association and the Mayo Clinic
