If you get a sinus infection and toothache, it can be very hard to tell which one is the cause and which one is a side-effect.
Sometimes, a sinus infection can feel just like an aching tooth. You have a dull ache in your cheek, right over a tooth, and the tooth itself can feel tender to bite on. It's possible for a sinus infection to imitate a toothache, even though the teeth are fine!
What are the clues that tell you if it's a genuine toothache or a sinus infection?
While it is sometimes possible for a tooth nerve pain to get worse when you lie down, and ease off when you stand up, you will also have pain with hot drinks or with cold drinks. This doesn't happen with a sinus infection.
How can a sinus infection and toothache occur at the same time?
A sinus infection and toothache can come about because of the way the upper molar teeth are positioned in the upper jaw. Basically, the roots of the upper back teeth sit very close to the sinus cavity. This is a small air-filled space inside your skull.
There are several little air pockets like this in the upper jaw, but the one we are talking about is the one right above the upper molar teeth, on each side of your head. It's also called the "maxillary antrum". It is just under your cheekbones.
If you get a sinus infection, and toothache at the same time, what is happening is that the inflammation inside the sinus is making the area around the upper molar tooth roots very tender. That's why it's uncomfortable to bite on these teeth, and why you have a dull ache in your cheek.
Read more about the signals of a sinus infection at sinusitis symptoms.
What about the other way around - Can a tooth problem cause a sinus infection?
It's possible. But you'd be aware of other problems in that area beforehand. For example;
SO, sinus infection and toothache CAN occur at the same time, but usually it's either a sinus infection that's also making the teeth tender, OR a genuine toothache that just feels like it's in your cheek. You'd be really unlucky to get a sinus infection AND toothache both at the same time!
Either way, the best thing to do is see your dentist. If it's a tooth problem, he's the right man to help you! On the other hand, if it's a sinus infection, he can refer you to your medical doctor. There is nothing, really, that you can do at home yourself.