You feel it coming. That familiar tightness creeping up the back of your neck, stiffening the base of your skull. Then, right on cue, the migraine hits. Your doctor says the neck pain is just a symptom of the migraine. But what if it's the other way around?
of migraine patients experience neck pain — pooled result from a systematic review and meta-analysis of 24 studies (Al-Khazali et al., Cephalalgia, 2022). In chronic migraine, this rises to 87%.
The Anatomy of the Problem
The reason neck pain and headaches are so closely linked comes down to a piece of neuroanatomy that most GPs don't have time to explain in a 10-minute appointment: the trigeminocervical nucleus (also called the trigeminocervical complex).
Here's the short version. The trigeminal nerve is the main sensory nerve for your head and face — it's responsible for carrying pain signals from your forehead, temples, and the area behind your eyes. The upper cervical spinal nerves (from C1, C2, and C3) carry sensory information from your upper neck and the base of your skull.
These two completely different nerve pathways converge and are processed at the same relay station in your brainstem — the trigeminocervical nucleus. Because the brain is receiving signals from both sources at the same place, it can get confused about where the pain is actually coming from. Dysfunction in the upper neck gets interpreted as pain in the head.
This is the same mechanism behind referred pain elsewhere in the body. A heart attack causes pain in the left arm. A lower back disc problem causes pain down the leg (sciatica). The brain misinterprets the source of the signal. In headache, the neck is often the true source.
Central Sensitisation: The Volume Dial
If your upper neck has been sending low-level distress signals to the brainstem for months or years — due to poor posture, an old injury, chronic muscle tension, or weakness — the brainstem starts to adapt. It becomes hyper-vigilant. It turns the volume dial up.
This is called central sensitisation. Your pain threshold drops. Now it takes very little stimulus to trigger a massive pain response. Things that shouldn't cause a headache — a glass of wine, a change in the weather, a missed meal, a stressful week — suddenly push you over the edge.
These things are triggers, not causes. They are the straw that breaks the camel's back. The camel's back was already loaded up by a sensitised nervous system driven by your neck.
What the Research Shows
This isn't a fringe theory. The research is consistent and compelling. Studies comparing headache sufferers to headache-free controls consistently find that those with chronic headaches have:
Significantly reduced cervical range of motion. More muscle trigger points in the neck and suboccipital region. Lower pressure pain thresholds at the upper cervical joints. Reduced neck extensor muscle strength. Pain that is reproducible by applying pressure to the upper cervical spine.
These are not subtle findings. They are consistent, measurable, physical differences — and they point clearly to the neck as a major contributor to chronic headache.
Why Triggers Aren't Causes
Understanding the difference between a trigger and a cause is the most important conceptual shift you can make if you want to get better.
Avoiding triggers is a management strategy. It helps you stay below the threshold. But it doesn't lower the threshold. If you want to stop having headaches, you need to lower the underlying sensitisation — and that means addressing the neck.
The practical implication: If you can rehabilitate your upper cervical spine — improve its mobility, strength, and motor control — you lower the baseline level of input into the trigeminocervical nucleus. Your pain threshold rises. The same triggers that used to floor you no longer have the same effect.
What To Do About It
The good news is that the nervous system is plastic — it can change. The sensitisation that has built up over months or years can be reversed through consistent, targeted cervical rehabilitation.
This means specific stretching to restore mobility to the upper cervical joints, progressive strengthening of the deep neck flexors and extensors, and motor control retraining to improve how your brain maps and controls your neck.
It takes time — typically 8 to 12 weeks of consistent work to see significant change. But the results are lasting in a way that pills and trigger avoidance simply are not.
If you want the complete protocol — the exact exercises, progressions, and timeline — that's exactly what The Headache Fix eBook covers.