Migraine tooth pain is real, and the tooth is often innocent. If a tooth aches without decay, without a crack, without a change on the x ray, and the pain comes in episodes with light sensitivity or nausea, the problem is more likely to be a nerve pathway than the tooth itself. Getting that distinction right matters, because the alternative is a root canal on a healthy tooth that does not fix anything.
Migraine is common enough in Australia that this situation turns up regularly. The Deloitte Access Economics whitepaper on migraine in Australia, published in 2018 and commissioned by a pharmaceutical sponsor, estimated 4.9 million Australians live with migraine, around 20.55 percent of the population. Those prevalence figures were modelled rather than measured in a national survey, so treat the exact percentage as an estimate rather than a count.
Key takeaways
- Neurovascular orofacial pain is a recognised diagnosis in the International Classification of Orofacial Pain. It can produce throbbing pain felt in the teeth with migraine features.
- Pain that migrates between teeth, with light or sound sensitivity or nausea, points away from a tooth.
- A dentist should not carry out irreversible treatment on a tooth that tests normal and shows no change on an x ray.
- Migraine and painful temporomandibular disorder are strongly associated, with reported odds ratios from 5.35 to 6.22 across studies.
- The link between grinding and migraine specifically is much weaker. Sleep bruxism was not significantly associated with migraine, with an odds ratio of 2.68 and a 95 percent confidence interval of 0.84 to 8.55.
- Splints have better support for jaw muscle pain than for migraine, and low certainty evidence suggests an occlusal stabilisation appliance does not reduce headache frequency.
How big a problem this is
The same Deloitte report estimated that 7.6 percent of Australians with migraine, roughly 400,000 people, have chronic migraine, meaning 15 or more headache days a month. Seventy one percent of Australians with migraine are women, and 86 percent are of working age. The report put the total economic cost at 35.7 billion dollars a year nationally, made up of 14.3 billion in health system costs, 16.3 billion in lost productivity and 5.1 billion in other costs.
Those figures are worth stating for scale, with the caveat already given. In any week of ordinary practice, some of the people in the chair with facial pain have migraine, and some will have been told the problem is their teeth.
Neurovascular orofacial pain
This has a proper name and a place in the classification systems. The International Classification of Orofacial Pain, first edition, published in Cephalalgia in 2020, includes neurovascular orofacial pain as a recognised entity. Benoliel, Elishoov and Sharav were describing orofacial pain with vascular type features as far back as 1997.
The presentation, as described by Haviv in Healthcare in 2023 and by Sharav, Haviv and Benoliel in the International Journal of Molecular Sciences in 2023, is episodic pain in the teeth and jaws, often one sided, throbbing or pressure like. It can migrate between teeth. It frequently comes with migraine features such as sensitivity to light and sound, nausea, and autonomic signs including a watering eye, a blocked nostril or facial flushing on the affected side.
A pattern documented repeatedly is that these patients receive root canal treatment on one tooth with no relief, then another, then an extraction, before someone recognises the picture and an antimigraine medication works. No reliable figure exists for how often this happens. It has been described in case series for decades but never quantified.
Why a healthy tooth can hurt
The anatomy explains it. Sensory nerves from the teeth, face and the coverings of the brain feed into the same area of the brainstem, along with nerves from the upper neck. That area is the trigeminocervical complex. Signals converge there before the brain works out where the pain came from.
Convergence means the brain can misattribute. Pain arising from the dura, the membrane around the brain, can be experienced as coming from an upper molar. Neck problems can be felt in the jaw. This is also why patients with this kind of pain genuinely cannot point to one tooth. They will press on three or four and say it is somewhere in there.
Toothache from a dying nerve behaves differently. It is usually provoked by something, most often cold or heat or biting, it lingers after the stimulus is removed, it gets worse over days rather than repeating in identical episodes, and it eventually becomes possible to identify one tooth.
Tooth or nerve, side by side
| Feature | Points towards a tooth problem | Points towards migraine or nerve pain |
|---|---|---|
| What sets it off | Cold, heat, sweet things, biting on it | Nothing obvious, or known migraine triggers such as poor sleep, skipped meals or stress |
| How long it lasts | Builds over days and stays, or lingers after a stimulus | Comes in episodes lasting hours, then settles completely between attacks |
| Where it is | You can point to one tooth | Vague, spread across several teeth, sometimes moving between them |
| Response to cold | Sharp, reproducible, often lingering afterwards | Little or no change, or an unhelpfully inconsistent response |
| Response to painkillers | Partial relief from anti inflammatories | Poor response to ordinary painkillers, better response to migraine specific medication |
| Other symptoms | Swelling, a bad taste, a tooth that feels raised when you bite | Light or sound sensitivity, nausea, watering eye, blocked nostril on that side |
| What the x ray shows | Decay, a broken restoration, widening or a dark area at the root tip | Nothing, and nothing new when the image is repeated later |
What a careful dentist does before touching a tooth
The tests are not complicated. Cold testing each suspect tooth and the matching tooth on the other side. Tapping and biting tests. Checking for cracks with magnification and transillumination. Probing around the gums. Taking an image of the tooth and, where the picture is unclear, comparing it against an earlier one or repeating it after a period of watchful waiting.
If all of those come back normal, the correct action is to stop and think again, not to open the tooth to see what happens. Irreversible treatment on a tooth that tests normal and shows no change on an x ray is not defensible. A root canal on a healthy pulp does not relieve pain that was never coming from the pulp, and the tooth is weaker afterwards.
The most useful thing a patient can bring is a record. Dates, how long each episode lasted, what you were doing, what you took and whether it helped. Two weeks of notes often settles the question faster than another x ray.
Sudden electric shock like jolts triggered by touching the face, shaving or a breeze are a different pattern again, and we cover that separately in trigeminal neuralgia or toothache. That article is about the stabbing, trigger point pain of a nerve disorder. This one is about the throbbing, episodic pain that behaves like migraine but is felt in the teeth.
Grinding, jaw joints and migraine
This is where the marketing gets ahead of the data, so it helps to separate three different relationships.
Bruxism and jaw disorders
Bruxism does increase the odds of a temporomandibular disorder. Pooled figures put the odds ratio at 2.25, with a 95 percent confidence interval of 1.94 to 2.56, and awake bruxism at 2.51, with a confidence interval of 2.02 to 2.99. Those intervals sit well clear of 1, so the association is solid.
Jaw disorders and migraine
A 2026 systematic review and meta analysis in the Journal of Oral Rehabilitation reported odds ratios for painful temporomandibular disorder in people with migraine ranging from 5.35, with a 95 percent confidence interval of 3.04 to 9.40, to 6.22, with an interval of 3.81 to 10.14. That is a strong association, and it is one reason jaw pain and headache so often arrive together.
Bruxism and migraine
Here the picture falls apart, and the confidence intervals show why. Sleep bruxism was not significantly associated with migraine, odds ratio 2.68 with a 95 percent confidence interval of 0.84 to 8.55. Severe sleep bruxism came out at 0.98, with an interval of 0.42 to 2.32. Only mixed bruxism, meaning both awake and asleep, reached significance at 1.96, with an interval of 1.16 to 3.32. Intervals that cross 1 mean the result is compatible with no effect at all.
The relationship is also heavily confounded. Disturbed sleep, stress, anxiety, medication and shared central sensitisation all sit between grinding and headache, and nobody has untangled which way the causation runs. Our article on grinding, clenching and headaches covers the muscular headache that grinding does cause, which is a different thing from migraine. If your main problem is a clicking, locking or aching joint, jaw joint pain and its treatment is the more useful read.
Splints, night guards and botulinum toxin
A splint is a reasonable tool for protecting teeth from wear and settling sore jaw muscles. It is not a migraine treatment. A scoping review of oral splints in migraine found low certainty evidence that an occlusal stabilisation appliance did not reduce headache frequency. Most splint trials for headache enrol people who also have a jaw disorder, so any benefit may be the jaw easing rather than the migraine.
Botulinum toxin is a genuine treatment for chronic migraine and a poor fit for most of what else it gets sold for. A Cochrane review and meta analysis published in 2019 found onabotulinumtoxinA reduced migraine days by about 2.0 days a month against placebo, with roughly double the placebo rate of treatment related adverse events and a withdrawal rate of about 3 percent. An umbrella review published in 2026 found it less effective than topiramate and the CGRP monoclonal antibodies.
The subsidised criteria in Australia are specific. Under the Pharmaceutical Benefits Scheme a patient needs an average of 15 or more headache days a month with at least 8 migraine days, over at least 6 months, and must have failed at least 3 prescribed preventives. Continuation requires a reduction of 50 percent or more in headache days after two 12 week cycles. It is not subsidised for episodic migraine, jaw disorders, bruxism related tooth wear or jaw pain, and it does not treat them. We set out what is and is not established in botulinum toxin for jaw clenching and grinding.
One more point belongs here. Regular use of acute painkillers on most days can perpetuate a headache rather than relieve it. If you reach for tablets nearly every day, raise it with your doctor.
Common questions
Can a migraine cause tooth pain?
Yes. Neurovascular orofacial pain is a recognised diagnosis producing throbbing, episodic pain in the teeth and jaws, often with light sensitivity or nausea. Facial and dural nerve signals converge in the brainstem, which lets the brain attribute pain to a tooth that is perfectly healthy.
Why does my tooth hurt but the dentist says it is fine?
If cold testing, biting tests and images are all normal, the pain is probably not coming from the pulp. Referred pain from migraine, jaw muscles, the sinuses or the neck are the usual explanations. A fortnight of symptom notes and a facial pain referral beat another opinion on the same tooth.
Can teeth grinding cause migraines?
The evidence for that specific link is weak. Sleep bruxism was not significantly associated with migraine in pooled analysis, odds ratio 2.68 with a confidence interval of 0.84 to 8.55. Grinding does contribute to jaw muscle pain and to a dull tension type headache, which is a different thing.
Do I need a night guard for migraines?
Not for migraine on its own. A night guard protects teeth from wear and can settle sore jaw muscles, and low certainty evidence indicates an occlusal appliance does not reduce headache frequency. If you have both jaw pain and migraine, a splint may help the jaw while your doctor manages the migraine.
Is my jaw pain causing my headaches?
They are strongly associated, with reported odds ratios above 5, but association is not direction. In practice both often need attention at once, with a dentist working on the jaw and muscles and a doctor on the migraine.
Where to start
If a tooth has ached for months and nothing has been found, ask for the tests to be repeated and bring a diary. If nothing changes on examination or imaging, ask your doctor about a facial pain or neurology referral before anyone drills. Teeth are not replaceable and a wrong diagnosis costs one.
The team at Lumi Dental is at Melrose Central in Melrose Park, open Monday to Saturday with Sunday by appointment. New patients can book through the new patient special, or contact the practice first.
This article is general information only and is not a substitute for personal dental or medical advice. Persistent facial pain or headache should be assessed by a dentist and a doctor together.
