Someone arrives convinced their jaw is the problem. Clicking, aching, sore to chew first thing in the morning. They mention, almost in passing, that they also get a headache at the base of the skull most afternoons — but that's separate, they think. A different thing. It usually isn't. Or it'll be the reverse: persistent upper-neck headaches, and somewhere in the history-taking they admit their jaw has been tight for years, but they assumed everyone's was.
Why the brain mixes them up
The temporomandibular joint — the jaw joint, just in front of the ear — and the small joints between the skull and the top two vertebrae send their sensory signals into the same place in the brainstem. It's called the trigeminocervical nucleus. The trigeminal nerve carries information from the face and jaw; the upper cervical nerves carry it from the suboccipitals, the little muscles tucked at the base of the skull. They converge at the same crossing point, and the brain has genuine trouble telling whose signal is whose.
That's why a jaw that's been clenching all night can produce a headache that feels like it lives at the base of the skull. And why suboccipitals that have been gripping during a long screen day can make the jaw ache by evening. The wiring is shared.
The mechanical link
It isn't only neural. The masseter, the temporalis, the medial and lateral pterygoids — the jaw muscles — anchor onto the skull within a few centimetres of where the suboccipitals attach. They're neighbours. Chronic tension in one group keeps the other group recruited, because the body braces them as a unit. Clench the jaw and the suboccipitals tighten with it. Tighten the suboccipitals and the jaw rides up to match. After a few months of this, neither group can stand down without the other.
What's usually feeding it
Stress clenching is the obvious one, and it's mostly happening at night — people are often surprised to learn how much grinding they do in their sleep. A partner mentions it, or the dentist sees the wear on the molars.
Cold-weather bracing is another. Shoulders hike, jaw clenches, suboccipitals shorten — it's a whole-pattern response to feeling cold, and in a Kootenay winter it can run for months.
Forward-head posture during long screen days loads the suboccipitals constantly; they're working to hold the head up against gravity in a position they weren't designed for. Once they're loaded, the jaw tends to follow.
Dental work that altered the bite — a crown that sits a fraction too high, a missing molar that's never been replaced — can keep the jaw muscles hunting for a comfortable resting position. They never quite find one. An old whiplash leaves the upper neck guarded for years afterward. And prolonged mouth-breathing, often from chronic nasal congestion, changes how the jaw rests at night and through the day.
What treatment actually looks like
I'll work on both ends. Counterstrain and soft-tissue work into the masseter and temporalis from the outside, and where it's appropriate, some intraoral work on the pterygoids — they sit deep behind the jaw and you can't reach them any other way. People are sometimes wary of intraoral work the first time; it's brief, gloved, and often the moment something genuinely lets go.
Then articulation of the upper cervical joints — the occiput on C1, C1 on C2 — and soft-tissue work into the suboccipitals themselves. These are tiny muscles but they hold an enormous amount of tone, and freeing them often produces an immediate change in jaw resting position. The reverse is true too: settling the jaw muscles down lets the suboccipitals release.
Beyond the joints and the muscles, I'll look at what's feeding the pattern. Workstation setup. Sleep posture. Breathing — whether the person is moving air through the nose or the mouth. If the grinding is severe enough to be wearing the teeth down, I'll send them back to the dentist for a nightguard, because no amount of manual work outpaces eight hours a night of clenching against bare enamel.
Why treating one half rarely works
This is the part I want to be clear about. People who chase only the jaw — splints, dental adjustments, jaw exercises — often get partial relief and then stall. People who chase only the neck — massage, stretches, posture work — get the same partial relief and the same stall. The pattern is one unit. Treating it as two separate problems is why some people have been carrying it for years.
When it's addressed together, it usually responds well. Three to five sessions for most people, with noticeable change by the second. Long-standing cases with significant grinding or an unresolved bite issue take longer, and may need the dentist involved. If it isn't holding after a few sessions, I'll say so — there's almost always a feeder I haven't found yet, and we'll go looking.
In health, Eli Mead, D.O.M.P.
This page is general education, not medical advice or a diagnosis, and reading it does not create a practitioner–patient relationship. For guidance on your specific situation, consult a qualified health professional. For severe, sudden, or worsening symptoms, seek immediate care.