TMJ as a missed cause of headache

If your headache sits in the temple, comes with jaw tightness, or is worse after a meal or a stressful night of clenching, the jaw is worth examining before anything else is added to your treatment. It is one of the most commonly missed contributors to headache, and one of the few that is easy to check in a few minutes.

What a temporomandibular disorder actually is

Temporomandibular disorder, or TMD, is not one condition. It covers problems of the temporomandibular joint itself, problems of the muscles that move the jaw, or both. In headache patients the muscular form dominates: in a study of 132 people with migraine, myofascial pain was the most prevalent form of TMD in both the episodic and chronic groups.¹

That matters, because a muscular problem does not show up on a jaw X-ray. People are sent for imaging, told the joint looks normal, and reasonably conclude the jaw was a dead end. The joint was never the question.

Two different relationships, and the distinction changes the treatment

There are two ways a jaw problem and a headache can be connected, and they are not the same thing.

• The TMD is causing the headache. The International Classification of Headache Disorders recognizes this as a secondary headache, item 11.7, headache attributed to temporomandibular disorder.² Treat the jaw and the headache should follow.
• The TMD and a primary headache coexist. Migraine and tension-type headache are genuinely comorbid with TMD — having one raises the likelihood of the other.² Here the jaw is a load on a system that already has a headache disorder, and both need addressing.

Efforts to identify a distinctive fingerprint for the secondary type have largely failed. The most that can be said is that it tends to sit in one or both temples and to look either migraine-like or tension-type-like.² So the label cannot be settled from the description of the pain alone, which is exactly why the jaw has to be examined rather than asked about.

How common this is in people whose headaches have become frequent

The association is strongest in the group that has the most to gain. In a single-center study of 90 people with chronic migraine and 42 with episodic migraine, TMD was present in 60% of the chronic group against 21.4% of the episodic group.¹ A separate study from the same group, in 63 chronic and 40 episodic migraine patients, found 47.5% against 28.5%.³

Both are modest, single-center samples and the exact percentages should not be read as precise. The direction is the consistent finding: the more frequent the headache, the more likely the jaw is involved. Frequent neck pain tracked the same way in the larger study, reported by 65.5% of the chronic group and 21.4% of the episodic group.¹

The relationship also runs the other way. A 2024 systematic review of cohort studies found that headache frequency, tension-type headache, migraine and mixed headache were themselves risk factors for developing TMD.⁴ Neither is simply causing the other; they feed each other.

The chronification question

The more consequential possibility is that untreated TMD helps push migraine from episodic toward chronic. This has been argued for over fifteen years, with cutaneous allodynia — tenderness of the scalp and face between attacks — proposed as the link.⁵ The evidence that TMD drives progression remains limited, and it would be overstating it to say the case is settled.

But the practical conclusion does not depend on settling it. A treatable source of continuous input into the trigeminal system, in someone whose headaches are becoming more frequent, is worth removing on its own merits. If it also slows chronification, that is a second reason. See chronic or episodic migraine for why the 15-day line matters so much.

Why it gets missed

• Temple pain reads as tension-type headache. The temporalis is a chewing muscle. Pain from it lands exactly where people expect a stress headache to be — see migraine or tension-type headache.
• The jaw is not examined in a standard headache visit. Palpating the masseter and temporalis and measuring jaw opening takes about two minutes and is frequently skipped.
• Patients do not report it. Jaw clicking and morning tightness are not experienced as a headache symptom, so they are not mentioned unless asked.
• A normal joint image closes the file. As above: the common form is muscular, and imaging of the joint does not exclude it.

What you can check before your appointment

None of this is diagnostic on its own, but it is worth arriving with the answers:

• Does the pain start or worsen while chewing, especially something tough?
• Is your jaw tight or sore on waking? That points toward clenching or grinding overnight.
• Can you fit three of your own fingers, stacked vertically, between your upper and lower front teeth? Less than that suggests restricted opening.
• Press firmly into the muscle at your temple and into the thick muscle at the angle of the jaw. Is one side clearly more tender?
• Does the jaw click, catch, or deviate to one side as it opens?

How this is handled here

The jaw and the chewing muscles are examined as part of a headache assessment rather than as a separate referral. Where a muscular pain source in the temporalis or masseter is contributing, that is treatable, and it is treated alongside the headache disorder rather than instead of it — a simultaneous approach to both conditions outperforms treating either one on its own.²

Where the joint itself, the bite, or nocturnal grinding is the primary driver, that is dentistry and orofacial pain territory, and we will say so and point you there rather than treat around it. Bruxism’s exact role in headache remains unclear even in the specialist literature.⁶

If the neck is also involved — and in frequent headache it usually is — see is my headache coming from my neck and cervicogenic headache treatment.

Common questions

Can a jaw problem really cause a headache, or is that a myth?

It is a formally recognized diagnosis. The International Classification of Headache Disorders lists headache attributed to temporomandibular disorder as item 11.7.² What is genuinely uncertain is how often a jaw problem is the sole cause rather than one contributor alongside a primary headache disorder — see migraine or tension-type headache.

My jaw X-ray was normal. Does that rule it out?

No, and this is the most common reason the diagnosis is missed. The form most often found in headache patients is myofascial — a muscle problem, not a joint problem — and it does not appear on imaging of the joint.¹ The examination is done with hands, not a scanner.

Should I get a night guard?

Possibly, but that decision belongs with a dentist, and a guard addresses grinding rather than headache directly. Bruxism’s role in headache is still not well defined.⁶ It is worth doing in parallel with headache treatment rather than as a substitute for it — contact us and we will tell you which order makes sense in your case.

My headaches have become almost daily. Is the jaw worth checking at that point?

That is exactly the group where it is most worth checking. TMD was found in 60% of chronic migraine patients against 21.4% of episodic in one study.¹ Also check whether acute medication is sustaining the pattern — see medication-overuse headache.

Do you inject the jaw?

Where a muscular pain source is contributing, that is treatable, and any injection here is placed under imaging rather than by landmark — see ultrasound and fluoroscopic guidance. Whether an injection is the right step depends on what the examination shows, which is why the assessment comes first.

Sources

1. Latysheva N, Platonova A, Filatova E. Temporomandibular disorder and cervicalgia: pathophysiology underlying the comorbidity with chronic migraine. Zh Nevrol Psikhiatr Im S S Korsakova. 2019;119(1):17-22. doi:10.17116/jnevro201911901117
2. Speciali JG, Dach F. Temporomandibular dysfunction and headache disorder. Headache. 2015;55(Suppl 1):72-83. doi:10.1111/head.12515
3. Zenkevich AS, Filatova EG, Latysheva NV. Migraine and temporomandibular joint dysfunction: mechanisms of comorbidity. Zh Nevrol Psikhiatr Im S S Korsakova. 2015;115(10):33-38. doi:10.17116/jnevro201511510133-38
4. Da-Cas CD, Valesan LF, Nascimento LP, et al. Risk factors for temporomandibular disorders: a systematic review of cohort studies. Oral Surg Oral Med Oral Pathol Oral Radiol. 2024;138(4):502-515. doi:10.1016/j.oooo.2024.06.007
5. Bevilaqua Grossi D, Lipton RB, Bigal ME. Temporomandibular disorders and migraine chronification. Curr Pain Headache Rep. 2009;13(4):314-318. doi:10.1007/s11916-009-0050-9
6. Romero-Reyes M, Bassiur JP. Temporomandibular disorders, bruxism and headaches. Neurol Clin. 2024;42(2):573-584. doi:10.1016/j.ncl.2023.12.010