Your Headache Might Be Hiding in Your Mouth

By Erin Solloway, DC

Unclench: The Overlooked Cause of Tension Headaches

You’ve tried water, electrolytes, magnesium, the dark room, the ibuprofen. Still, that tight band wraps around your head by 3pm every afternoon.

The true culprit to your tension headache may actually be hiding in your mouth.

The Muscles You Never Think About

Your jaw is one of the hardest-working joints in your body. It moves when you talk, chew, swallow, and clench through a stressful day. Four key muscles do the work:

• Masseter: The powerhouse at the angle of your jaw. Tension here can refer pain to your temples and behind your eyes.
• Temporalis: A broad muscle fanning across your temple. When it’s tight, it feels like a classic tension headache.
• Medial pterygoid: Sits on the inside of the jaw and can mimic ear pain or deep facial tension.
• Lateral pterygoid: Controls how your jaw opens and glides, and is a common driver of clicking, popping, and TMJ trouble.

When these muscles are overworked from stress, clenching, grinding, or posture, they can trigger pain that feels like it’s coming from your head, and the science backs it up. In an ultrasound study of 54 people with tension-type headache and 40 healthy controls, the headache group had thicker masseter and temporalis muscles, both at rest and when clenching. Headache intensity was also linked to masseter thickness during contraction. In other words, the harder those jaw muscles work, the worse the headache can be (Uysal et al., 2026).

Larger reviews show the same pattern. A 2024 meta-analysis found that both tension-type headache and migraine were tied to a significantly higher risk of jaw disorders, roughly four times higher for tension headaches and nearly four times for migraine (Bizzarri et al., 2024).

The Neck Connection

Your jaw and neck are not separate systems. They’re one working unit, and typically if one is tight, the other is too.

• Shared posture: Forward head posture from desks, phones, and driving shifts the jaw out of its resting position. The jaw muscles then work harder just to keep your mouth closed.
• Shared muscles: In one study, adults with chronic tension headaches had lower pain thresholds and weaker deep neck muscles than healthy controls. A tight jaw and a weak, irritated neck feed the same loop (Muñiz et al., 2023).

Here’s the part most people never hear: the muscles of the jaw and neck can keep headaches going and treating them often brings headaches down. Your head may be where it hurts, but it isn’t always where the problem lives.

Why You May Have Missed It

Most people treat headaches at the site of pain, but the source can be a few inches away. And it’s far more common than you’d guess. One meta-analysis found that about 61% of people with tension-type headache also had a jaw disorder. Many of those patients have simply never had their jaw and neck checked together (Yakkaphan et al., 2022).

Signs Your Jaw and Neck May Be Involved

• Waking up with headaches or a sore jaw
• Clicking, popping, or limited opening
• Tight, achy temples by afternoon
• Stiffness at the base of your skull or across your shoulders
• Clenching or grinding, even if you only notice when you’re stressed
• Headaches that don’t respond to the usual fixes

What Helps

Releasing the jaw and neck muscles can make a real difference. Hands-on soft tissue work, including gentle intraoral release, helps calm overworked muscles, ease tension, and bring headaches down in both intensity and frequency. Pair that with stress management, posture awareness, and catching daytime clenching, and the results are more likely to last.

Try this now: Let your lips close, keep your teeth apart, and rest your tongue gently on the roof of your mouth. Then gently tuck your chin and lengthen the back of your neck. Your jaw should feel heavy and loose, and your neck should feel tall, not strained. If either doesn’t, you may have found your trigger.

Sources

1. Uysal, A., Güngör Demir, U., & Güntel, M. (2026). Ultrasonographic masseter and temporalis thickness in tension-type headache. Acta Neurologica Belgica, 126(4), 1365–1373. https://doi.org/10.1007/s13760-026-03087-9
2. Muñiz, J. Á. D. B., Flor, Á. G., Balmaseda, D. D., Vera, D. M., Sierra, A. S., & Sevilla, G. G. P. (2023). Pain sensitization and atrophy of deep cervical muscles in patients with chronic tension-type headache. Revista da Associação Médica Brasileira, 69(10), e20230841. https://doi.org/10.1590/1806-9282.20230841
3. Bizzarri, P., Manfredini, D., Koutris, M., Bartolini, M., Buzzatti, L., Bagnoli, C., & Scafoglieri, A. (2024). Temporomandibular disorders in migraine and tension-type headache patients: a systematic review with meta-analysis. Journal of Oral & Facial Pain and Headache, 38(2), 11–24. https://doi.org/10.22514/jofph.2024.011
4. Yakkaphan, P., Smith, J. G., Chana, P., Renton, T., & Lambru, G. (2022). Temporomandibular disorder and headache prevalence: A systematic review and meta-analysis. Cephalalgia Reports, 5. https://doi.org/10.1177/25158163221097352