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Do your upper teeth ache, even though no cavity turned up? The cause may sit higher up than your teeth. Tooth pain from a sinus infection happens when swollen sinuses press on the roots of your upper teeth. A sinus infection, called sinusitis, is inflammation of the air pockets in your face, and the largest of those pockets sits right above your upper back teeth. A dental exam is the fastest way to tell dental pain from sinus pain and rule out a true tooth problem. Knowing the difference helps you treat the right problem the first time.

Key Takeaways

Why Does a Sinus Infection Cause Tooth Pain?

The answer is about location. The maxillary sinuses are two air pockets in your cheekbones, and they sit just above the roots of your upper back teeth. According to the Mayo Clinic, the roots of the upper teeth are very near or may even reach into the sinus, so sinus inflammation can cause pain in nearby teeth. This is called referred pain, which means pain that is felt in a spot away from its true source. When the sinuses swell and fill with pressure, that pressure pushes on the tooth roots and feels like a toothache.

How Can You Tell Sinus Pain From a Real Toothache?

A few clues help you sort it out. Sinus tooth pain usually affects several upper teeth on one side, not one exact tooth, and it often comes with a stuffy nose, facial pressure, or a headache. The ache may get worse when you bend forward, lie down, or move your head quickly. A true dental problem, like a cavity or a cracked tooth, tends to stay in one tooth and may hurt sharply when you bite. Searches like tooth pain no cavity are common, because the ache is real even when the teeth look healthy. You may also notice the pain shift a little when you change head position, which rarely happens with a true toothache.

What Should You Do First?

Start with your teeth, not the pharmacy. A dental exam checks for decay, cracks, and infection, and an X-ray shows what the eye cannot see. If your teeth turn out healthy, the pain is likely coming from the sinuses rather than from anything in the tooth itself. Booking oral exams near me and starting with a dental visit saves time and points you toward the right treatment. It also rules out a dental infection that could spread if it is missed.

How Is Sinus Tooth Pain Treated?

Treatment depends on the cause. Many sinus infections are caused by a virus and clear on their own in about seven to ten days, with rest, fluids, and steam or saline rinses to ease the pressure. A saline rinse is simply salt water used to flush the nose. Over-the-counter decongestants or pain relievers can help in the meantime. Staying hydrated and holding a warm compress to the face can also ease the pressure on the tooth roots. If symptoms last beyond about a week or keep coming back, a physician may check whether antibiotics are needed for a bacterial infection. Once the sinus problem settles, the tooth pain usually fades along with it.

When Should You See the Dentist Again?

Some pain is worth a second look. If the ache stays in one tooth, throbs, or lingers after the sinus symptoms clear, book a dental visit. Pain that wakes you at night, swelling in the gum, or pain when biting points to a dental cause rather than the sinuses. Older adults, and anyone with a dry mouth from medication, can be more prone to hidden decay, so a prompt exam is wise. Catching a real dental problem early keeps treatment shorter and less involved. A dental infection in an upper tooth can also drain into the sinus, which is one more reason to have lasting pain checked.

Getting to the Real Source of the Pain

Tooth pain from a sinus infection is common, and it fools a lot of people. When several upper teeth ache, and a stuffy nose or facial pressure comes along, the sinuses are often to blame. A dental exam is the smartest first step, because it rules out a cavity, crack, or infection before you treat the sinuses. Once a dental exam clears your teeth, you can focus on calming the sinus problem and letting the ache fade.

  • If you want to learn more about tooth pain from a sinus infection, visit our Exams in Beverly Hills, CA, page or schedule a consultation.