Aching teeth or an achy jaw during a cold or flu is common and usually settles as you recover. The most frequent cause is pressure in the sinuses, which sit just above the roots of the upper back teeth.
Why a cold or flu makes teeth ache
- Sinus pressure: swollen, blocked sinuses press on the nerves of the upper back teeth. Several teeth ache at once and it is often worse when you bend forward.
- Mouth breathing: a blocked nose dries the mouth, which can make teeth and gums feel sensitive.
- Clenching and grinding: poor sleep, coughing and feeling unwell can lead to jaw clenching and a sore jaw.
- General body aches: flu causes muscle and joint aches, and the jaw joints and muscles can be part of that.
How to tell sinus pain from a tooth problem
Sinus-related pain tends to affect several upper teeth on one or both sides, comes with a blocked nose or facial pressure, and eases as the cold clears. A dental problem is more likely if the pain is in one tooth, is sharp with hot, cold or biting, or continues after you are well. Our article on toothache, sinus pain and headache explains the difference in more detail.
Looking after your teeth while sick
- Keep brushing twice a day and cleaning between your teeth.
- Drink plenty of water and choose sugar-free lozenges and cough medicine where you can.
- After vomiting, rinse with water and wait about 30 minutes before brushing, as stomach acid softens enamel.
- Replace or clean your toothbrush once you have recovered.
When to see a dentist
Book a dental visit if the ache is in one tooth, lasts more than a week or two after the illness has passed, or comes with swelling in the gum or face. A dental check-up with an X-ray if needed can show whether a tooth is the cause.
To book an appointment at Penrith Dental Care, 42 Castlereagh Street, Penrith, call the practice or book online. We are open Monday to Friday 9am to 6:30pm and Saturday 9am to 5pm.