Can a stiff neck be the real cause of your headaches?

Roughly 1 in 6 chronic headache sufferers actually have a cervicogenic headache — a headache arising from the upper cervical spine — but only a fraction are diagnosed correctly. The misdiagnosis is consequential: cervicogenic headache typically responds poorly to migraine medications and excellently to targeted manual therapy. Recognising it is one of the highest-yield diagnoses in headache medicine.

What cervicogenic headache actually is

Cervicogenic headache (CGH) is a secondary headache caused by referred pain from structures of the upper cervical spine — most commonly the C1–C2 zygapophyseal joints, the C2–C3 joint, the sub-occipital muscles, and the upper cervical ligaments. The pain referral happens via the trigeminocervical nucleus, the brainstem cell column where the trigeminal nerve and the upper three cervical nerves share neural real estate (Bogduk, 2004). Input from a sensitised upper cervical joint reaches the same cells that handle facial and forehead sensation; the brain interprets the signal as a headache.

The International Headache Society's ICHD-3 classification requires evidence of cervical pathology and clinical features pointing to the neck for a formal CGH diagnosis (Headache Classification Committee, 2018).

How to recognise it

The classic CGH presentation is:

• Unilateral or side-dominant headache that does not switch sides within an attack.
• Pain starting at the base of the skull or upper neck and radiating forward into the temple, behind the eye, or to the forehead.
• Provoked or worsened by specific neck postures — sitting at a desk, driving, reading, sleeping on the wrong pillow.
• Restricted neck movement, particularly rotation toward the side of pain.
• Tenderness on palpation of the upper cervical extensors and C1–C2.
• No or mild nausea; light/sound sensitivity less prominent than in migraine.
• Attacks lasting hours to several days, often less throbbing and more aching than a migraine.

The most useful test in clinic

The cervical flexion-rotation test (CFRT) — first described by Hall and Robinson (2004) — is the most sensitive and specific clinical test for C1–C2 dysfunction associated with cervicogenic headache. With the patient supine and the neck fully flexed (so C2–T1 segments are locked), the examiner rotates the head left and right. Normal rotation is 44° in each direction. A loss of more than 10° on either side has a sensitivity of around 90% and specificity above 85% for identifying CGH (Ogince et al., 2007). When the test reproduces the patient's headache, the diagnosis is essentially confirmed.

Why it is so often mis-diagnosed as migraine or tension headache

Three reasons repeat:

1. The patient often does not think of the neck, because the pain is felt in the head.
2. Migraines, tension headaches and CGH can co-exist. Mixed presentations are the norm in long-standing headache; a CGH driver under a migraine umbrella is easy to miss without a structured cervical screen.
3. Most headache assessments don't include a flexion-rotation test. Without it, the C1–C2 contribution stays hidden.

What the evidence shows for treatment

Manual therapy directed at the upper cervical spine — including high-velocity, low-amplitude mobilisations and the Dean Watson Technique (a structured, sustained-pressure assessment-and-treatment system developed by Australian physiotherapist Dr Dean Watson) — has the strongest evidence base for CGH. A 2017 systematic review pooled 8 RCTs and found a clinically meaningful reduction in headache frequency, intensity and duration, with effects sustained at 12 months in some trials (Jull and Stanton, 2017; Côté et al., 2019). The number needed to treat is among the most favourable in headache medicine.

What a typical treatment programme looks like

• 4–6 sessions of targeted manual therapy to C1–C2 and C2–C3, with progress measured by CFRT range gain and headache-frequency reduction.
• Deep neck flexor activation drills — the chin-tuck-in-supine pattern — held for 10 seconds, building to 10 × 10-second holds.
• Postural correction for screen, driving and reading positions.
• Identification of jaw co-drivers — TMD and CGH overlap in about 40% of patients, and missing the jaw side stalls full recovery.
• Sleep posture review — a too-high pillow or stomach-sleeping reliably perpetuates CGH.

What does NOT work for cervicogenic headache

• Migraine prophylactic medications — they target central migraine pathways and do little for cervical-driven pain.
• Heat-only home programmes without specific manual work.
• Generic neck stretches. CGH responds to segmental mobilisation of specific joints, not broad muscle stretching.
• Long-term over-the-counter painkillers. Daily use of codeine, ibuprofen or paracetamol can additionally cause medication-overuse headache, layering a second problem on top of the first.

Red flags — when neck pain is more than CGH

The 99% of neck-driven headaches are benign and respond to targeted physiotherapy. A small number need urgent imaging and onward referral. Red flags include:

• Sudden severe onset ("thunderclap").
• Fever, neck rigidity, or photophobia (consider meningitis).
• Recent head or neck trauma.
• Neurological symptoms — limb weakness, slurred speech, visual loss, balance change.
• Headache progressively worsening over weeks without responding to anything.

Any of these warrant prompt GP or A&E review rather than physiotherapy.

The takeaway

If your headaches are side-dominant, start at the base of the skull, and are provoked by certain neck positions, you may well be dealing with cervicogenic headache. A specialist assessment that includes a flexion-rotation test takes about 15 minutes and can change the entire treatment plan. The encouraging part is that of all the chronic headache presentations, this is one of the most consistently responsive to skilled physiotherapy — often within 4–8 weeks.