Jaw pain. Headache. Clicking or popping when you chew. Pressure behind the eyes or temples that seems to radiate from your jaw up into your skull. If you’ve ever had these symptoms together, you’ve probably wondered which condition is actually driving the bus — is this a migraine that’s affecting your jaw, or a jaw problem that’s giving you headaches?
The honest answer is that it’s often both, tangled together at the same source. Migraine and temporomandibular joint disorder (TMJ or TMD) overlap so heavily that researchers have spent decades trying to untangle which comes first. Understanding the difference — and understanding what actually connects them — can change how you approach treatment for either one.
What TMJ Disorder Actually Is
TMJ disorder refers to dysfunction of the temporomandibular joint, the hinge connecting your jawbone to your skull just in front of each ear. Common symptoms include:
- Jaw pain or tenderness, often worse with chewing
- Clicking, popping, or grinding sounds when opening or closing the mouth
- Locking of the jaw in an open or closed position
- Difficulty or discomfort with a full range of jaw motion
- Facial pain, particularly around the temples, cheeks, or in front of the ear
- Headaches that seem to originate from the jaw or temple region
What Migraine Actually Is
Migraine is a neurological condition, not simply “a bad headache.” It typically involves moderate to severe throbbing pain, usually on one side of the head, accompanied by nausea, sensitivity to light and sound, and in some cases visual or sensory aura. Migraine attacks tend to build gradually and can last anywhere from several hours to several days.
Why They Get Confused — and Why They Coexist So Often
Here’s the key fact that explains the overlap: TMJ pain and migraine pain travel through overlapping nerve pathways. The muscles of mastication — the temporalis, masseter, and pterygoid muscles that let you chew — are controlled by the mandibular branch (V3) of the trigeminal nerve. Migraine pain, meanwhile, is generated largely through the ophthalmic branch (V1) of that same trigeminal nerve and processed in a brainstem relay station called the trigeminocervical complex (TCC).
Because both TMJ pain signals and migraine pain signals converge on this same trigeminocervical processing center, the nervous system has a hard time keeping them cleanly separated. Research has found that people with TMJ disorder are at meaningfully increased risk of also developing migraine, and vice versa — the relationship goes both directions. Pain from a dysfunctional jaw joint can sensitize the same brainstem circuitry that generates migraine, and an already-sensitized migraine brain can, in turn, make jaw muscles more reactive and prone to clenching, grinding, and pain.
This is exactly why so many people experience both conditions together rather than one clearly causing the other: they aren’t really two separate problems sharing a coincidental location. They’re two expressions of dysfunction in the same shared neural network.
The Upper Cervical Spine: A Root Cause Behind Both
This is where the atlas (C1) becomes central to understanding why this shared pathway gets disrupted in the first place — and it’s the piece that’s often missing from conventional treatment of either condition.
How Atlas Misalignment Drives TMJ Dysfunction
The trigeminocervical complex isn’t just a relay station for pain — it’s a hub where the trigeminal nerve and the upper cervical spinal nerves physically converge and influence each other’s activity. When the atlas is misaligned, it generates abnormal sensory input into this shared brainstem region. Because the mandibular branch of the trigeminal nerve — the one controlling the muscles that move your jaw — synapses in this same converged network, aberrant signaling from a misaligned atlas can directly alter the resting tone of the muscles of mastication.
In practical terms: an atlas that’s out of alignment can push the muscles that control your jaw into abnormal, uneven tension patterns. One side pulls tighter than the other. The jaw is drawn out of its natural resting position. Over time, this uneven pull on the temporomandibular joint itself produces the clicking, popping, grinding, and pain that define TMJ disorder — not because there’s necessarily a structural problem with the joint itself, but because the muscles controlling it are being driven abnormally from above by faulty upper cervical signaling.
This is a critical insight for anyone who has tried mouth guards, jaw exercises, or dental splints for TMJ without lasting success: if the root disruption is coming from the atlas rather than the jaw joint itself, treating the joint alone will only ever manage symptoms, not resolve the underlying driver.
How Atlas Misalignment Sets the Stage for Migraine
The same misaligned atlas that disrupts jaw muscle tone can independently set the stage for migraine, often through several compounding mechanisms.
Dysafferentation and the trigeminocervical complex. The joints of the upper cervical spine carry an especially dense supply of proprioceptive nerve receptors. When C1 is misaligned, it generates abnormal, low-grade “noise” into the trigeminocervical complex on an ongoing basis. Because this is the exact same relay station that processes trigeminal migraine pain, this constant abnormal input can lower the threshold at which the migraine system fires, making attacks easier to trigger and harder to shut off once started.
The myodural bridge. The suboccipital muscles at the base of the skull attach directly to the dura mater, the pain-sensitive membrane surrounding the brain. Misalignment at C1 creates uneven tension in these muscles, which transmits directly to the dura and can generate or intensify headache and migraine pain.
Flanagan’s choke point theory — a deeper look. Dr. Michael Flanagan has proposed one of the more comprehensive biomechanical explanations for how upper cervical misalignment could set the stage for migraine, centered on the craniocervical junction acting as a mechanical “choke point.” This theory deserves a closer look because it pulls together several distinct factors:
- CSF flow restriction. Cerebrospinal fluid must circulate freely between the skull and spinal canal. According to the choke point theory, misalignment of the atlas can narrow the space through which CSF flows at the craniocervical junction, disrupting normal circulation and contributing to pressure changes inside the skull.
- Venous back-up. The internal jugular veins, which carry deoxygenated blood out of the skull, pass directly through this same crowded region at the base of the skull. If atlas misalignment narrows this space, venous outflow can be restricted, causing blood to back up inside the skull. This venous congestion is theorized to raise intracranial pressure and irritate pain-sensitive structures, potentially contributing to headache and migraine.
- Reduced arterial supply. The vertebral arteries, which help supply blood to the brainstem and posterior brain structures, also travel directly through the upper cervical vertebrae on their way to the skull. Misalignment at C1 can subtly compress or kink these arteries, theoretically reducing the volume or quality of arterial blood flow reaching the brainstem — a region critically involved in migraine generation.
- Direct brainstem irritation. The brainstem sits in extremely close proximity to the craniocervical junction. Combined restriction of CSF flow, venous drainage, and arterial supply in this crowded anatomical space is theorized to create a low-grade irritative environment around the brainstem itself — the same brainstem structures implicated in migraine generation, including the trigeminocervical complex and brainstem nuclei involved in nausea, light sensitivity, and pain modulation during a migraine attack.
Taken together, Flanagan’s theory suggests that the craniocervical junction can function as a bottleneck affecting three distinct fluid and blood supply systems at once — CSF, venous, and arterial — and that chronic mechanical narrowing at this junction due to atlas misalignment may create the physiological conditions that make a brain more susceptible to migraine. It’s important to be transparent that this is a theory proposed by a single author and represents a hypothesis used by many upper cervical practitioners to explain a subset of migraine presentations, rather than an outcome established through the same weight of research as more foundational anatomy like the myodural bridge. Patients should understand it as a plausible, proposed mechanism rather than settled science.
Why This Matters for Treatment
If both your jaw pain and your migraines are being driven, at least in part, from the same misaligned atlas feeding faulty signals into a shared brainstem network, then treating the jaw and treating the head as separate, unrelated problems may only ever produce partial relief. A mouth guard can protect your teeth from grinding. Migraine medication can blunt an attack in progress. But neither addresses why the muscles are clenching or why the migraine threshold is so easily crossed in the first place.
Upper cervical chiropractic care focuses specifically on identifying and correcting misalignment of the atlas and axis, with the goal of restoring normal signaling into the trigeminocervical complex, normal tension in the suboccipital and jaw muscles, and — per the choke point theory — normal CSF, venous, and arterial flow through the craniocervical junction. For patients whose TMJ symptoms and migraines have resisted improvement through dental, medication-based, or muscle-focused treatments alone, evaluating the atlas may reveal a shared structural root cause behind both conditions.
The Bottom Line
TMJ disorder and migraine aren’t just two conditions that happen to occur in the same neighborhood. They share a nerve pathway, and in many people, they share a root cause at the top of the spine. If you’ve been treating your jaw and your headaches as unrelated problems without lasting success, it may be worth having your upper cervical spine evaluated to see whether both are being driven by the same misalignment.
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician, dentist, or qualified health provider with questions about a medical condition.
Written by Dr. Drew Hall, Upper Cervical Chiropractor
To locate an upper cervical chiropractor near you, visit www.neckwise.com