Why Do My Teeth Hurt When I Have Allergies?

Is it a Cavity or Just Allergy Season? How Allergies Affect Your Teeth

By Dr. Chris Christensen, Sandia View Family Dental 

If you live in our area, you know that allergy season isn't just about sneezing and itchy eyes—it’s a total body experience. But one of the most common "hidden" symptoms of seasonal allergies is something that brings patients into my chair in a panic: sudden tooth pain.

It’s a scary feeling when a tooth starts aching out of nowhere. Your first thought is naturally, "I have a cavity," or "I need a root canal." However, if that discomfort is hitting you right as the pollen counts are climbing, the culprit might not be your teeth at all. It might be your sinuses.

The Anatomy of an "Allergy Toothache"

To understand why allergies make your teeth hurt, you have to look at how close everything is packed together. Your maxillary sinuses (the ones right behind your cheeks) sit directly above the roots of your upper teeth. In fact, for many people, only a thin sliver of bone separates the two.

When allergies kick in:

  1. Pressure Builds: Your sinuses become inflamed and fill with fluid.
  2. The "Squeeze": That literal physical pressure pushes down on the nerve endings of your tooth roots.
  3. The Result: A dull, throbbing ache that makes your teeth feel incredibly sensitive, especially when you’re walking, jumping, or bending over.

How to Tell the Difference

So, how do you know if you should call me or grab an antihistamine? Here are the hallmark signs of an allergy-related toothache:

  • It’s "The Whole Neighborhood": Cavities usually hurt in one specific spot. Allergy pressure usually affects multiple upper teeth at once.
  • The "Jump" Test: If you take a quick hop or walk down a flight of stairs and feel a "thud" or increased pressure in your teeth, it’s likely sinus-related.
  • The "Wait and See": If the pain fluctuates based on how congested you are, it’s a strong sign your sinuses are the lead actor in this drama.

When to Come See Us at Sandia View Family Dental

While I love it when the "fix" is just a decongestant and some rest, you should never ignore persistent pain. If your toothache is sharp, isolated to one tooth, or accompanied by a fever, it’s time for an exam.

Even if it is just allergies, we’re always happy to take a quick look and give you peace of mind. We’d rather tell you your teeth are perfectly healthy than have you sit at home in discomfort!

Are your allergies giving you a headache—and a toothache? DM us or give us a call. Nichole and the team will get you on the schedule so we can figure it out together.

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