You’ve had headaches for years. Maybe you’ve even been told it’s migraine. But the pain always seems to start in the same spot at the back of your skull, your neck feels stiff and tender before it hits, and pressing on certain spots in your neck seems to bring the exact same headache back. Is that still migraine — or has it been a neck problem the whole time?
This distinction isn’t academic. Cervicogenic headache and migraine can look remarkably alike, but they’re classified as entirely different disorders, and the research on how the neck and the head “talk” to each other neurologically explains both why they’re so easy to confuse and why the neck may matter more to migraine than it’s traditionally been given credit for.
What Cervicogenic Headache Actually Is
Cervicogenic headache is a secondary headache — meaning it’s caused by an identifiable problem somewhere else in the body, rather than being a standalone neurological disease the way migraine is. It’s defined as a headache caused by a disorder of the cervical spine and its bony, disc, and/or soft tissue structures, usually — though not always — accompanied by neck pain. To make the diagnosis, there generally needs to be clinical and/or imaging evidence of a disorder or lesion within the cervical spine or the surrounding soft tissues that’s known to be capable of causing headache, along with evidence tying the two together: the headache developing in relation to the onset of the cervical problem, improving alongside improvement in that problem, worsening with reduced neck range of motion or provocative movement, or resolving after a diagnostic nerve block of a cervical structure.
That last piece is a big deal clinically. One of the defining features of true cervicogenic headache is that it can be shown to resolve after a properly controlled diagnostic block of a cervical nerve or structure — something migraine doesn’t respond to in the same predictable way. That’s part of why nerve blocks are often used as a diagnostic tool when the clinical picture is unclear, since cluster headache and related disorders don’t respond to anesthetic blockades the way cervicogenic headache does.
Migraine vs. Cervicogenic Headache: The Distinguishing Features
There are some general clues clinicians use to separate the two, though none of them is individually definitive:
- Location and behavior: Cervicogenic headaches typically originate in the neck or occipital region, while migraines usually start in the frontotemporal area. Migraines also tend to shift from side to side across episodes, whereas cervicogenic headaches tend to stay locked on one side.
- Provocation: Features that tend to point toward cervicogenic headache rather than migraine or tension-type headache include side-locked pain, headache brought on by digital pressure on the neck muscles or by head movement, and pain that radiates from back to front.
- Migrainous features can still be present: Nausea, vomiting, and sensitivity to light or sound can still show up with cervicogenic headache, generally to a lesser degree than in migraine — which is exactly why the overlap trips people up.
Here’s the catch, though: these clinical clues alone aren’t always enough to make a definitive diagnosis, because it can be genuinely difficult to distinguish cervicogenic headache from migraine and tension-type headache on clinical grounds alone. Even headache specialists lean on nerve blocks and imaging rather than symptoms alone when the picture is muddy.
Why the Neck and the Head Share a Nervous System
The reason these two conditions blur together isn’t coincidence — it’s anatomy. Both cervicogenic headache and migraine route through the same piece of brainstem circuitry: the trigeminocervical complex (TCC).
The trigeminal nerve, which carries sensation from the face and the coverings of the brain, doesn’t stay in the brain. Its central pathway descends into the upper spinal cord and fuses with the incoming sensory pathways from the upper cervical nerves (C1–C3) into one shared processing column. This complex receives converging input from trigeminal fibers and from the C1 to C3 spinal nerves, giving both headache and neck pain a shared anatomical home. Because the same neurons are handling signals from both regions, the brain can genuinely struggle to tell whether pain originated in the neck or the face — which is exactly why a neck problem can produce head pain that feels just like a migraine, and why manual pressure on the upper neck has been shown in migraine patients to reliably reproduce their exact, familiar headache.
The Myodural Bridge: A Direct Physical Connection
Beyond shared nerve wiring, there’s an actual physical tether between the top of the neck and the covering of the brain: the myodural bridge. The suboccipital region contains myodural bridges connecting the obliquus capitis inferior, rectus capitis posterior minor, and rectus capitis posterior major muscles directly to the dura mater — the tough membrane that envelops the brain and spinal cord. Researchers have also identified direct collagenous attachments linking the outer layer of the dura to the nuchal ligament, suggesting a structural and potentially functional continuum between these tissues.
What that means practically: these fascial-dural attachments suggest that cervical movement and muscular tension may influence dural mechanics and contribute to nociceptive sensitization — in other words, tight or dysfunctional suboccipital muscles can literally tug on the dura itself, activating pain-sensitive structures around the brain through nothing more complicated than mechanical tension. This is one of the more concrete, anatomically demonstrable links between upper neck dysfunction and headache pain, cervicogenic or otherwise.
Dysafferentation Theory: When the Neck Sends Bad Signals
A third piece of this puzzle is a concept upper cervical practitioners call dysafferentation. Mechanoreceptors — the sensory receptors that respond to mechanical deformation — are found throughout the joints and muscles of the upper cervical spine and play a central role in conveying position sense to the central nervous system. When a spinal joint becomes fixated or inflamed, the sensory nerves at that joint can fire abnormally, sending a distorted stream of positional and pain information up to the spinal cord and brain — a mismatch between what the joint is actually doing and what the nervous system thinks it’s doing.
Since those same upper cervical afferents feed directly into the trigeminocervical complex alongside trigeminal input, the theory holds that this distorted, abnormal signaling could disrupt the TCC’s normal processing and lower the threshold for triggering a headache. There’s real supporting data here: migraine patients show an increased frequency of musculoskeletal findings in the upper cervical spine, and separate research has found that migraine patients test worse than headache-free controls on measures of upper cervical proprioception and tactile discrimination. What’s still debated is the direction of cause and effect — whether faulty joint mechanics are feeding bad signals that help trigger migraine, or whether repeated migraine attacks themselves are what’s degrading cervical proprioception over time. The influence of peripheral structures like neck muscles or cervical joints on migraine remains a topic of ongoing scientific debate, though researchers generally agree that musculoskeletal dysfunction in the upper cervical spine is worth identifying and treating, if only to avoid feeding ongoing nociceptive input into the trigeminocervical complex.
Flanagan’s Choke Point Theory: A Different Angle Entirely
A separate, more mechanical hypothesis comes from chiropractic neurologist Michael Flanagan, whose 2015 paper proposed that the craniocervical junction (CCJ) — where the skull meets the atlas — functions as a “choke point” for fluid dynamics in and out of the skull. According to Flanagan’s theory, the CCJ is a potential choke point for craniospinal hydrodynamics that may play a causative or contributory role in a range of neurological conditions, including migraine, because malformations and misalignments there may obstruct blood and cerebrospinal fluid (CSF) flow. That obstruction, the theory proposes, can decrease perfusion pressure and arterial flow into the brain, potentially resulting in oxidative stress and chronic ischemia. The underlying idea is that the CCJ links the vascular and CSF systems of the cranial vault to those of the spinal canal, so a misalignment here could theoretically bottleneck both blood drainage and CSF circulation at the same time.
It’s important to be clear about what this theory is and isn’t. Flanagan’s paper is a hypothesis-generating review, not a body of controlled clinical trials proving that atlas misalignment causes migraine through fluid obstruction. Some small studies have looked in this direction — for instance, one study reported improved cerebral spinal fluid flow patterns following upper cervical chiropractic intervention in migraine cases — but this line of research is still early, and the choke point theory remains a proposed mechanism awaiting the kind of large, controlled studies that would be needed to confirm it.
Putting It Together
So: is it a migraine, or is it your neck? In many cases, the honest answer is “both, sort of” — because the trigeminocervical complex means the two are never fully separable at the level of the brainstem. A true cervicogenic headache is a distinct, secondary condition with its own diagnostic criteria, best confirmed through imaging and diagnostic nerve blocks rather than symptoms alone. But even in classic migraine, the myodural bridge gives the neck a literal physical grip on the dura, dysafferentation theory offers a plausible route by which poor upper cervical joint function could feed disruptive signals into shared brainstem circuitry, and Flanagan’s choke point theory raises a fluid-dynamics angle that’s still being explored.
None of this replaces a proper diagnostic workup. If your headaches are neck-driven, side-locked, or reliably provoked by neck movement or pressure, that’s worth raising with both a headache specialist and a provider who evaluates the upper cervical spine — since getting the diagnosis right is what determines whether the right treatment is medication, physical therapy, injections, or some combination of all three.
This article is for educational purposes and is not a substitute for professional medical diagnosis or treatment. If you’re experiencing persistent or worsening headaches, please consult a physician or headache specialist.