The Neck Connection: When Your Spine Talks to Your Brain

The stiffness starts at the base of your skull. It creeps upward — a slow, tightening grip that wraps around your temples. Within hours, the full migraine arrives. And you’re left with a question that millions of people with migraine ask their doctors every year: is my neck causing these headaches, or is my migraine causing the neck pain?

The answer, according to a growing body of neuroscience research, is one that most people never hear. It could be both — at the same time, through the same neural pathway, in a loop that feeds itself.

The Symptom Nobody Talks About

Migraine has a reputation problem. Ask anyone what happens during an attack and they’ll mention throbbing head pain, nausea, sensitivity to light. What they rarely mention is the neck.

They should. A 2022 meta-analysis pooling data from multiple clinical studies found that 77% of migraine patients reported neck pain — making it more common than nausea, the symptom most people consider migraine’s hallmark.^[1] Population-based research has confirmed similar numbers: upwards of 75% of adult migraineurs experience neck pain.^[2] And for people with chronic migraine, the odds of neck pain are roughly double those in episodic migraine.^[1]

The consequences extend far beyond discomfort. A 2024 multicountry study of over 51,000 participants across six nations found that migraineurs with neck pain experienced nearly twice the rate of moderate-to-severe disability compared to those without it. They also reported higher rates of depression (40.2% vs 28.2%), anxiety (41.2% vs 29.2%), and significantly reduced work productivity.^[3]

The Relay Station That Blurs Everything

To understand why, you need to look at a small region deep in the brainstem called the trigeminocervical complex (TCC).

Picture a highway interchange. Two major roads merge into a single lane. The trigeminal nerve — the brain’s primary pain messenger for the head and face — sends signals into this interchange. So do the nerves from the top three vertebrae of your neck: C1, C2, and C3. Both sets of signals converge onto the same neurons in the trigeminocervical complex, which relays one combined message to the brain.^{[4, 5]}

The result is bidirectional referral. Pain originating in your cervical spine can travel through the complex and be interpreted as head pain — behind the eyes, across the forehead, deep in the temples. Migraine pain generated by the trigeminal system can travel the opposite direction and be felt as neck stiffness, soreness, and aching.^{[4, 6]}

Your brain receives one signal. It cannot separate the source. Neck pain and head pain arrive through the same door.

The Great Diagnostic Trap

This shared pathway creates one of the most stubborn diagnostic puzzles in headache medicine.

Cervicogenic headache (CEH) — a secondary headache caused by structural problems in the cervical spine — can look almost identical to migraine. It can produce nausea, light sensitivity, sound sensitivity, and pain that worsens with movement.^{[9, 10]} The reason: cervical nociception (pain signaling from the neck) activates the same trigeminocervical nucleus that migraine uses, generating remarkably similar downstream symptoms.

Yet the two conditions are fundamentally different. Migraine is a primary neurological disorder — a brain genetically wired to generate attacks. Cervicogenic headache is a mechanical problem — facet joints, discs, or muscles in the neck sending pain signals upward.^{[10, 11]} The treatment for one may do nothing for the other.

How often does this distinction get missed? One study examining chronic headache patients found that 92% of those with cervicogenic headache had been incorrectly diagnosed.^[7] Other researchers have estimated that roughly half of cervicogenic headache cases receive the wrong diagnosis, leading to years of ineffective treatment.^[8]

There are clinical clues that help distinguish cervicogenic headache from migraine. Cervicogenic headache tends to be fixed on one side — always the same side, attack after attack. Neck range of motion is typically reduced. Pain is triggered or worsened by specific neck movements or sustained awkward postures. The upper cervical region is tender to palpation.^{[9, 10]} The flexion-rotation test, in which a clinician gently rotates your flexed neck, identifies cervicogenic headache with 91% sensitivity and 90% specificity.^[12]

But here’s the complication that changes everything: many people don’t have one or the other. They have both.

The Overlap That Rewrites the Rules

A 2022 multicenter study asked migraine patients to map their pain locations on an electronic form. The result: 55% showed a pain pattern consistent with trigeminocervical convergence — meaning their migraine involved significant cervical components.^[13] Among people with chronic migraine, the percentage climbed higher still.

Central sensitization explains how this overlap deepens over time. During a migraine attack, neurons in the trigeminocervical complex become hyperexcitable. Signals that would normally be filtered out — minor neck tension, subtle postural strain — get amplified into full pain signals.^{[14, 15]} The neck muscles that started with ordinary stiffness become active pain generators, feeding signals back into the brainstem, which amplifies the migraine, which sensitizes the neck further.

A prospective study of 487 migraineurs captured this in real time. Sixty-nine percent reported neck pain during their migraine phase. Among those, 54% noticed the neck pain arriving with the headache, and 24% felt it within two hours before the head pain began — accompanied by other migraine symptoms like nausea, light sensitivity, and vertigo.^[16] The researchers posed a question that remains unanswered: does the premonitory phase end where the attack begins, or has the neck been part of the attack all along?

Treating What You’ve Been Missing

This overlap carries a direct clinical message. If cervical dysfunction is contributing to your migraine — as a trigger, an amplifier, or a coexisting condition — treating only the migraine leaves the cycle incomplete.

The evidence for addressing the neck is growing. A 2023 systematic review found moderate-certainty evidence that manual therapy reduced cervicogenic headache frequency by approximately one episode per week compared to sham (simulated) treatment.^[17] A program combining spinal manipulative therapy with deep neck flexor exercises showed particular promise, with benefits sustained over the long term.^[18]

For migraine patients with persistent neck involvement, the data point toward an integrated approach. A meta-meta-analysis found that manual therapy combined with exercise reduced pain intensity and improved quality of life across migraine, tension-type headache, and cervicogenic headache alike.^[19] The pattern that works targets three elements: restoring cervical mobility, strengthening the deep neck flexors, and retraining motor control.^{[18, 20]}

The neck and the brain speak to each other through the same neural pathway. For too many people with migraine, treatment addresses only one side of that conversation. Listening to both could change everything.