If I seem obsessed with seasonal allergies, it is because I am suffering this year more than most. I am continually surprised by the odd pains I experience as side effects of my "hay fever," like pains in my molars. Let's start at the beginning.
The human body tries to eliminate those pesky allergens with mucus. 
Yes, the mucus really wants to be your friend, an ally in this battle; but if the mucus doesn't flow out, when you try to blow it out, it hangs around in your sinuses creating congestion and causing pressure and pain. We have many sinus cavities in our skulls, but the ones on either side of your nose (aka the maxillary sinuses) need to drain upward, an action not so easily accomplished if we are upright, which we are for most of the day. These sinuses sit on your upper jaw, and when congested they can put pressure on the surrounding areas causing pain in your upper teeth, cheeks, and right below the eyes. If your sinuses become inflamed or infected, the pain could be even more extreme. Not only do those allergens make your eyes and nose run, they can indirectly create tooth pain.
If you are experiencing dental pain and are prone to allergies accompanied by nasal congestion and sinus infections, then you can probably assume that sinus pressure is causing the pain in your teeth. If you're not so sure, give your dentist a call.
Halston
black'Up
Alexander Wang
I'm so glad i saw this! My molars have been a little ache-y and I couldn't figure out why. I didn't realize it was connected with my sinus pressure! Thanks Fit!
1One of my wisdom teeth is starting to come out, and it only hurts during the days that I have my period...is this connected somehow??
2Your sinuses run deep throughout your cranium and upper jaw. When I used to suffer from extreme sinusitis and severe chronic sinus infections my teeth would KILL. The pain was horrible.
Then I went to the dentist and he said my wisdom teeth were hollow and decaying though they hadn't broken the surface of the gum yet. The x-rays showed that my upper wisdom teeth were actually touching or penetrating my sinus cavity! His thought was if we could could them out my sinus infections might ease up because my wisdom teeth could have been triggering the infections. So when my wisdom teeth ruptured I had to pulled out and within weeks my sinus infections started to lessen and eventually become so infrequent that I don't even recognize when I have them.
However, when I do have sinus pain or even serious congestion my first thought is "Is it my teeth causing this?" and I make an appointment with my dentist and ENT. Sometimes it is my teeth causing the sinus pain and sometimes it my sinuses causing the tooth pain.
I still have horrible allergies but they rarely become sinus infections now and my sinusitis is under control now.
3"If you are experiencing dental pain and are prone to allergies accompanied by nasal congestion and sinus infections, then you can probably assume that sinus pressure is causing the pain in your teeth."
This is so me that you're describing...I have all three of these things: year-round allergies, chronic sinus infections, and dental pain related to my sinus issues. Add to that my TMJ (basically chronic jaw pain) and I'm pretty miserable more than half the time
4i'm going through this right now...the pain in my cheeks and front teeth is unbearable...
thx fit.
5Ouch...
6One test I use to determine whether it's my sinuses or my actual teeth that are giving me trouble is: How many teeth hurt at a time? If it's more than one, it's my sinuses. No, it's not a perfect test, but it hasn't failed me yet. But it might be easier to not worry; I had my wisdom teeth out when I was 15.
7I just experienced this molar pain for the first time this spring. I thought I had a tooth that needed pulled! Once my sinuses cleared, pain was gone!
8Glad to read that this is common.
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