Can Chiropractic Care Help With Migraines? A Structural Explanation

By Dr. Andrew Biggs, DC | Principled Chiropractic | Royal Palm Beach, FL

If you have ever experienced a migraine, you know that "headache" is an insufficient word for what it is.

The pulsing, one-sided pain that makes light unbearable and sound excruciating. The nausea.

The visual disturbances, the aura that tells you one is coming and that there is no stopping it now.

The hours spent in a dark room, waiting for it to pass, rearranging your entire day around an attack that arrived without permission and will leave on its own schedule.

Migraines affect more than 39 million Americans. They are the third most prevalent illness in the world and the sixth most disabling. And for the tens of millions of people who live with them chronically, experiencing multiple attacks per month, sometimes per week, the standard treatment path of medication management, trigger avoidance, and neurological consultation offers only partial answers to a problem that disrupts work, relationships, and quality of life at a profound level.

What most migraine sufferers have never been told is that the upper cervical spine, the top two vertebrae in the neck, sitting directly beneath the brainstem, plays a documented, physiologically significant role in migraine generation. Correcting structural dysfunction in that region often produces reductions in migraine frequency, intensity, and duration that medication alone cannot achieve.

This is not an alternative medicine claim. It is an anatomical and neurological fact with a growing body of peer-reviewed research behind it. Understanding this may change the way you think about your migraines entirely.

What Migraines Actually Are

Before we can explain how the cervical spine relates to migraines, it helps to understand what a migraine actually is, because it is not simply a severe headache. It is a complex neurological event with specific physiological mechanisms that science has been working to understand for decades.

The headache phase of a migraine involves activation of the trigeminocervical complex, a convergence zone in the brainstem where pain signals from the head, face, and upper neck are processed and transmitted to the brain.

The trigeminal nerve, the primary sensory nerve of the face and head, is the central player in migraine pain. When activated, it releases inflammatory neuropeptides including calcitonin gene-related peptide (CGRP) into the meningeal blood vessels, producing the inflammatory cascade that generates migraine pain. The trigeminovascular system, the network of pain-sensing nerve fibers surrounding the blood vessels of the brain and meninges, is the immediate source of the throbbing, pulsing pain that characterizes a migraine attack.

In migraines with aura, the neurological event begins even earlier with a phenomenon called cortical spreading depolarization (CSD), a slow wave of intense neuronal depolarization that spreads across the cortex at approximately 3 to 5 millimeters per minute, generating the visual disturbances, sensory changes, and other aura symptoms that precede the headache. CSD can activate the trigeminocervical complex, which is one of the mechanisms connecting the aura phase to the headache phase.

Understanding these mechanisms is important, because they point directly to the brainstem and upper cervical spine as central structures in migraine generation, and that is precisely where chiropractic care directs its attention.

The Trigeminocervical Nucleus: Where the Cervical Spine and Migraine Converge

The key anatomical structure connecting the cervical spine to migraine is the trigeminocervical nucleus, sometimes called the trigeminocervical complex or the nucleus caudalis. This is a convergence zone in the brainstem and upper cervical spinal cord where sensory input from two distinct sources comes together.

The first source is the trigeminal nerve, which carry pain signals from the face, scalp, meninges, and intracranial blood vessels.

The second source is the upper three cervical nerve roots, C1, C2, and C3, carrying sensory input from the upper neck, suboccipital muscles, upper cervical facet joints, the C2-3 intervertebral disc, the dura mater of the upper spinal cord, and the vertebral arteries.

These two pain systems, the trigeminal (from the head) and the cervical (from the neck), converge and intermingle in the trigeminocervical nucleus. This convergence means that irritation or sensitization of the upper cervical nerve roots can directly sensitize the trigeminal pain pathways, lowering the threshold at which a migraine attack is triggered and amplifying the intensity of pain once an attack begins.

The nucleus receives input from the upper three cervical spine segments, and therefore spinal problems may contribute to nerve facilitation. The trigeminal nucleus innervates the cranium, as well as many intracranial and extracranial blood vessels. Afferents from the first three cervical vertebrae nerve roots also innervate the dura mater, the scalp, and many suboccipital muscles.

This is the anatomical basis for what researchers call the cervicogenic component of migraine, the contribution of upper cervical dysfunction to migraine generation, severity, and frequency that has been documented in the clinical and basic science literature for decades.

How Upper Cervical NeuroStructural Shifts Contribute to Migraines

With this neuroanatomy established, the relationship between upper cervical NeuroStructural Shifts and migraine becomes clear.

When the atlas (C1) or axis (C2) shifts out of their normal structural position, due to birth trauma, injury, accumulated postural stress, whiplash, or the forces of everyday life, several things happen simultaneously that directly affect migraine threshold and frequency.

Mechanical Sensitization of the Upper Cervical Nerve Roots

A NeuroStructural Shift in the upper cervical spine creates mechanical irritation of the C1, C2, and C3 nerve roots. These roots feed directly into the trigeminocervical nucleus. When they are mechanically irritated and chronically sensitized, they continuously feed low-level nociceptive (pain) input into the convergence zone, raising the overall level of neurological activity in the trigeminocervical nucleus and lowering the threshold at which a full migraine attack is triggered.

This is why many migraine sufferers report that their attacks are preceded by neck stiffness or pain, or that neck tension is a reliable trigger for their migraines. The neck is not simply responding to the migraine; in many cases, the chronic irritation of the upper cervical nerve roots is actively contributing to the sensitization of the trigeminocervical nucleus that makes migraines more frequent and more severe.

Clinical observations suggest that migraines may be aggravated or potentially caused by cervical spine conditions. Even though migraines related to cervicogenic conditions are clinically recognizable, the exact mechanisms are still being refined, but the clinical evidence for the relationship is robust.

Brainstem Stress

The brainstem sits directly above the atlas vertebra. When the atlas shifts out of its normal position, it can create mechanical stress on the brainstem itself, the very structure that houses the trigeminocervical nucleus, the vagal complex, the reticular formation, and the vascular regulatory centers that are all involved in migraine generation and regulation.

The structures that sit directly beneath the atlas (the trigeminal nucleus, the vagal complex, the reticular formation, the vascular regulatory centers) are exactly the structures that become dysregulated during a migraine attack.

Mechanical stress on the brainstem from atlas misalignment does not need to be dramatic to be neurologically significant. The brainstem is exquisitely sensitive to its mechanical environment. Even subtle, sustained pressure or dural tension from an atlas that is not properly positioned can alter brainstem function in ways that lower migraine threshold, disrupt autonomic regulation, and create the neurological environment in which migraine attacks occur more frequently and with greater severity.

Vascular Regulation and Blood Flow

The vertebral arteries, the major blood vessels supplying the brainstem and posterior brain, travel through the transverse foramina of the upper cervical vertebrae before entering the skull. When upper cervical NeuroStructural Shifts alter the normal position of the atlas and axis, they can affect the mechanical relationship between the vertebrae and the vertebral arteries running through them.

Research on migraine pathophysiology has documented the role of vascular dysregulation, abnormal changes in blood flow to the brain, as a component of migraine generation. Abnormal blood flow patterns, vasodilation of meningeal blood vessels, and disruptions to cerebrovascular tone are all involved in migraine. Upper cervical structural integrity directly affects the mechanical environment of the vertebral arteries and the autonomic nervous system pathways that regulate cerebrovascular tone.

Autonomic Dysregulation

Many migraine sufferers experience autonomic symptoms alongside their attacks; nausea, vomiting, sensitivity to light and sound, nasal congestion, tearing, and facial flushing. These symptoms reflect dysregulation of the autonomic nervous system during a migraine event.

The upper cervical spine houses the origin of critical autonomic regulatory pathways, including the vagus nerve and the cervical sympathetic chain. NeuroStructural Shifts in this region can create chronic autonomic dysregulation, a state of impaired balance between sympathetic and parasympathetic function that contributes to both the autonomic symptoms of migraine and the neurological instability that makes attacks more frequent.

Surgical decompression of the C2 nerve root has resulted in reduction of nausea, photophobia, phonophobia, and vomiting, the autonomic symptoms of migraine, in documented clinical cases. This finding powerfully supports the role of upper cervical nerve root irritation in generating these symptoms and underscores the potential of reducing that irritation through structural correction.

Types of Headaches and How the Cervical Spine Relates to Each

Not all headaches are the same, and the cervical spine's role varies across different headache types. Understanding these distinctions helps clarify who is most likely to benefit from structural chiropractic care.

Cervicogenic Headache

Cervicogenic headache is a headache that originates directly from dysfunction in the cervical spine, typically the upper three segments. Pain is referred from the neck into the head and can mimic migraine closely, including one-sided location, nausea, and sensitivity to light. The incidence of cervicogenic headache is estimated to be 14 to 18 percent of all chronic headaches.

For cervicogenic headaches, the cervical spine is not just a contributing factor, it is the primary source. These headaches respond most dramatically and most consistently to upper cervical structural correction, often with significant improvement in just a few visits.

Migraine

True migraine involves a complex neurological cascade (cortical spreading depolarization, trigeminal activation, neurogenic inflammation) that goes beyond simple cervicogenic referral. However, as the research establishes, the upper cervical spine plays a significant modulatory role through the trigeminocervical nucleus. Chronic upper cervical dysfunction lowers migraine threshold, increases attack frequency, and amplifies pain severity. Correcting the structural dysfunction does not stop the neurological cascade of an individual attack, but it raises the threshold at which attacks are triggered and reduces the neurological input that feeds into the convergence zone where migraine pain is generated.

Research shows that migraine without aura frequently has a strong cervicogenic component. For many patients, the contribution of cervical dysfunction to their migraine pattern is substantial and addressing it produces meaningful, measurable clinical improvement.

Tension-Type Headache

Tension-type headaches, the band-like pressure across the forehead and temples that is the most common headache type, are highly cervicogenic in origin. The suboccipital muscles and upper cervical joints are typically the primary source of the referred pain pattern. A 2018 study documented a strong association between trapezius muscle tenderness and both the intensity and frequency of headaches among office workers, a finding consistent with the well-established relationship between upper cervical and cervicothoracic dysfunction and tension headache.

Tension headaches respond particularly well to upper cervical structural correction, often dramatically and relatively quickly.

What the Research Shows

The clinical evidence for chiropractic care in migraine management has grown substantially in recent years.

The Journal of Chiropractic Medicine Study

Studies published in the Journal of Chiropractic Medicine in 2016 documented that patients with migraine without aura who received chiropractic care experienced significant reductions in migraine frequency, intensity, and duration. The improvements were consistent and clinically meaningful, not marginal statistical differences but changes that patients reported as substantially improving their quality of life.

The BioMed Research International Study

A study published in BioMed Research International following migraine patients who received upper cervical chiropractic care found statistically significant improvement in migraine symptoms, including reduced frequency, intensity, and duration. The improvements were attributed to the restoration of normal neurological function at the level of the trigeminocervical nucleus following correction of atlas and axis misalignment.

The NUCCA Studies

A 2019 case series published in Cureus examined patients with chronic migraine who received NUCCA (National Upper Cervical Chiropractic Association) adjustments. Participants experienced a noticeable reduction in headache days, improved sleep, and better overall quality of life. In a 2007 pilot study using the same protocols, patients with migraine showed a significant decrease in both frequency and intensity after just eight weeks of upper cervical care.

The Randomized Controlled Trial

A randomized controlled trial examining chiropractic spinal manipulative therapy for migraine found significant reduction in migraine days after three months of care. The study examined the presence of cervical musculoskeletal impairment in migraine patients and found measurable impairment in cervical range of motion and postural alignment; evidence that structural cervical dysfunction is present and clinically relevant in this population.

The Population-Level Finding

Research has documented that 70 to 82 percent of migraine patients experience significant reduction in frequency, intensity, and duration when upper cervical alignment is corrected. These figures represent not a fringe finding but a consistent pattern across multiple studies and clinical populations.

We present this research not to overclaim, as migraines are a complex neurological condition, and not every patient will experience the same degree of improvement. The fact is that the evidence is substantial enough that any person living with chronic migraines who has not had their upper cervical spine evaluated is missing a significant piece of the puzzle.

The Medication Question

Most migraine patients have been on one or more medications: triptans (Imitrex), beta-blockers, calcium channel blockers, antidepressants used prophylactically, newer CGRP antagonists like Aimovig or Nurtec. Many of these medications provide meaningful relief for many patients. We are not suggesting that medication has no role.

What we are suggesting is that medication addresses the neurochemical events of a migraine attack (the CGRP release, the vasodilation, the serotonin dysregulation) without addressing the structural neurological environment in which those events are more likely to occur. Many migraine patients are able to reduce or eliminate medication use after addressing underlying upper cervical dysfunction. When the neurological irritation contributing to a lowered migraine threshold is removed, the brain's own regulatory systems are better able to prevent the cascade from being triggered in the first place.

For patients who find that medication is becoming less effective over time (a common pattern called medication overuse headache or rebound headache) addressing the structural component of their migraine pattern may provide a path to reducing medication dependence while achieving better overall control of attacks.

What Evaluation and Care Look Like at Principled Chiropractic

When a patient comes to us with a history of migraines, our evaluation is thorough and specific.

We take a detailed history of the migraine pattern, onset, frequency, duration, intensity, known triggers, aura characteristics, associated symptoms, and any relationship between neck pain or stiffness and attack onset. We ask about the patient's history of head or neck injuries, even those that seemed minor at the time, including childhood falls, sports concussions, or whiplash from motor vehicle accidents. Many patients trace the beginning of their migraine history to a specific injury event, and the upper cervical dysfunction established by that injury can persist for decades.

We then perform a comprehensive structural examination of the upper cervical spine, assessing the position, alignment, and mobility of the atlas and axis, evaluating the range of motion of the cervical spine in all directions, and, with radiography, identify the specific NeuroStructural Shifts that may be contributing to the patient's migraine pattern.

The corrective adjustments we provide for migraine patients are precise, gentle, and specifically targeted at the upper cervical structures identified in the examination. For many patients, the adjustment involves light, specific force applied to the atlas. The precision of the analysis and the specificity of the correction are what produce the clinical results.

We track progress objectively over the course of care, asking patients to monitor their migraine frequency, intensity, and duration using a simple headache diary. This allows us to assess whether structural correction is producing meaningful clinical change and to adjust the corrective plan accordingly.

Who Is Most Likely to Benefit

Based on both the research and our clinical experience, the patients most likely to experience significant migraine improvement through upper cervical chiropractic care include those who:

• Notice that neck pain or stiffness precedes or accompanies their migraines

• Can trace the beginning of their migraine history to a head or neck injury

• Have migraines that are consistently one-sided and occur on the same side

• Experience significant relief from lying down and applying pressure to the base of the skull

• Have migraines triggered by specific neck positions or movements

• Have tried multiple medications with inadequate results

• Experience migraines alongside other symptoms of upper cervical dysfunction; dizziness, ear fullness, tinnitus, or visual disturbances not classic for migraine aura

These patterns do not guarantee that structural correction will be the answer, but they are strong indicators that upper cervical dysfunction is a significant contributing factor worth evaluating and addressing.

A Different Question to Ask

If you have been living with chronic migraines and the primary question you have been asking is "what medication should I try next?" we invite you to also ask a different question.

What is the structural and neurological environment in which my nervous system is operating? Is there dysfunction in my upper cervical spine that is sensitizing my trigeminal pain pathways and lowering my migraine threshold? Has anyone ever looked?

For most migraine patients, the honest answer to that last question is no. The structural integrity of the upper cervical spine, its relationship to the brainstem, the trigeminocervical nucleus, the vertebral arteries, and the autonomic pathways that regulate neurological stability, is not part of the standard migraine workup. It is not ordered on an MRI. It is not assessed in a neurology office, and because no one is looking for it, it goes unidentified and uncorrected in millions of people whose migraine frequency and severity it is directly influencing.

We look for it. And we know how to correct it.

If you are ready to explore whether a structural approach might be the missing piece of your migraine puzzle, we invite you to schedule a complimentary consultation at Principled Chiropractic.