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If your teeth start aching in spring and you cannot work out why, a dentist might not be the first person you need to see. Hay fever has a handful of effects on your mouth that most people never connect to pollen. Sinus pressure, dry mouth and disturbed sleep all quietly raise your risk of toothache, decay and gum trouble.
Here is what happens in your mouth during hay fever season, and the small habits that make a difference.
Yes. The most common reason is sinus pressure.
Your maxillary sinuses sit just above your upper back teeth, separated by a thin layer of bone. When hay fever inflames the sinus lining and pressure builds, that pressure pushes down on the tooth roots beneath. The result can feel very like a toothache, usually dull and persistent, and often worse when you bend forward or lie down.
The clue that it is sinus related rather than dental is the pattern. The discomfort tends to affect several upper back teeth at once rather than one specific tooth, and it usually eases when your sinuses clear.
If the pain stays focused on a single tooth, sticks around after pollen season, or wakes you up at night, it is worth seeing your dentist. Sinus referred pain and dental pain can feel very similar, and only a clinical examination tells you which is which.
Covered above, but worth restating. If your upper back teeth ache during pollen season, your sinuses are the likely culprit. The teeth themselves are often fine, but persistent pain still warrants a check.
Most over the counter hay fever tablets work by reducing histamine, which calms your symptoms. A common side effect is reduced saliva production.
Saliva is your mouth's natural defence. It washes away food debris, neutralises the acids in food and drink, and carries minerals that help repair enamel. When saliva drops, decay risk goes up. Cavities can form faster, and weak spots can get worse more quickly.
If you are taking antihistamines daily through pollen season, you are effectively living with a mildly dry mouth for weeks. It is worth knowing.
A blocked nose pushes you to breathe through your mouth, especially while you sleep. Six to eight hours of mouth breathing dries out your tongue, gums and teeth.
You will often notice it first as bad breath in the morning, or gums that feel tender or look slightly swollen. Over the longer term it is not good for your gums or your teeth.
Most of this is simple, and none of it requires an appointment.
Drink water through the day. Plain water, not tea, coffee or fizzy drinks. Staying hydrated helps your body keep producing saliva even with antihistamines on board.
Chew sugar free gum after meals. Chewing stimulates saliva flow.
Try a saline nasal spray before bed. Clearing your nasal passages even briefly can help you breathe through your nose for the first stretch of the night. Ten seconds at the bathroom sink, low effort.
See your GP if hay fever is wrecking your sleep. A different antihistamine or a steroid nasal spray may suit you better than what you have got. Better symptom control means less mouth breathing, which means less mouth trouble.
See your dentist if pain lingers. Sinus toothache tends to fade as the sinuses clear. Dental toothache does not. If pain persists past pollen season or stays focused on one tooth, book a check up.
Hay fever does not damage your teeth on its own, but it can raise the risk of decay and gum trouble through dry mouth, mouth breathing and antihistamine side effects. Sinus pressure can also mimic toothache convincingly enough to send you to the wrong appointment.
Sip water through the day, chew sugar free gum, clear your nose before bed, and pay attention to whether tooth pain follows pollen levels or sticks around regardless. That is most of what you need to know.
Can a sinus infection cause tooth pain?
Yes. Your maxillary sinuses sit directly above your upper back teeth. When sinus pressure or infection builds, it can press on the tooth roots and create a toothache like sensation. The pain usually spans several upper back teeth and eases as the sinus pressure resolves.
How can I tell if my toothache is from hay fever or a dental problem?
Sinus toothache typically affects several upper back teeth at once, feels dull and pressure like, and worsens when you bend forward. A dental problem more often focuses on one tooth, sharpens with hot or cold food, and does not track with pollen levels. If you are unsure, see your dentist for an examination.
Does dry mouth from antihistamines damage teeth?
Not directly, but it raises the risk of decay. Saliva protects against acid and bacteria, so when there is less of it, teeth are more vulnerable. If you take antihistamines daily through hay fever season, drink water regularly, chew sugar free gum and keep up with your check ups.
How long does sinus toothache usually last?
It typically eases within a few days as the sinus inflammation settles. If it is lasting longer than a week or two, or staying focused on one tooth, see your dentist.
A check up is the quickest way to find out. A new patient examination is £35, and you can see the full price list on our fees page. Call 0161 969 7464, book online at our booking portal, or read more about joining as a new patient.
The Smile Design consultation is free, there is nothing to pay and nothing to commit to. Call 0161 969 7464, or book online and we will take it from there.
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