How Can the Neck Cause a Headache?

Cervicogenic headache is a form of referred pain — head pain that originates from nociceptive structures in the cervical spine and upper neck musculature, perceived in the head because of shared neurological pathways. The concept that musculoskeletal structures in the neck can generate pain perceived in the head, scalp, and face is well-supported by neuroanatomy and clinical research, yet cervicogenic headache remains underdiagnosed — partly because its presentation overlaps with tension-type headache and migraine, and partly because patients and clinicians focus on the site of perceived pain (the head) rather than its source (the neck).

The Trigeminocervical Nucleus

The neurological basis of cervicogenic headache is the trigeminocervical nucleus — a column of second-order neurons in the brainstem and upper cervical cord where afferent input from the trigeminal nerve (which carries sensory information from the face and scalp) converges with afferent input from the upper cervical nerve roots (C1, C2, C3, which carry sensory information from the upper neck structures). This convergence creates the conditions for referred pain: nociceptive input from the upper cervical joints, muscles, and ligaments can activate second-order neurons that are also receiving input from trigeminal territories, and the brain — interpreting the signal based on prior experience — may perceive the pain in the head rather than, or in addition to, the neck. Experimental studies confirm that injection of painful stimuli into the upper cervical joint capsules, posterior neck muscles, and suboccipital structures consistently produces referred pain in the head and face in healthy volunteers.

What Causes Cervicogenic Headache?

The most common sources of cervicogenic headache are: upper cervical joint dysfunction (particularly C0–C1, C1–C2, and C2–C3 facet joints and atlantoaxial joint); suboccipital muscle hypertonicity and trigger points (rectus capitis posterior major and minor, obliquus capitis superior and inferior); upper trapezius and sternocleidomastoid trigger points; and cervical disc pathology at the upper and mid-cervical levels. The clinical contexts in which cervicogenic headache is most prevalent include: prolonged desk and screen work producing sustained upper cervical loading; whiplash-associated disorders; direct cervical trauma; and postural patterns maintaining the upper cervical spine in sustained extension-compression (the "poke chin" head position characteristic of prolonged sitting). Sleep position on a poorly supportive pillow can maintain the upper cervical spine in provocative positions through the night.

Distinguishing feature: Cervicogenic headache characteristically begins in the neck or occipital region and radiates forward — the reverse pattern of most primary headaches, which begin at the front or sides of the head. Neck movement or sustained neck postures that reproduce the headache are highly specific for a cervical origin.

Identifying Cervicogenic vs Other Headaches

The International Headache Society diagnostic criteria for cervicogenic headache require: clinical, laboratory, or imaging evidence of a cervical disorder known to cause headache; headache that develops in temporal relation to the cervical disorder; headache that is reduced with treatment of the cervical source; and headache that is unilateral without side-shift (though bilateral presentations exist). Clinically, the most useful differentiating features are: reproduction of the patient's headache with palpation or movement provocation of specific upper cervical structures; reduced cervical range of motion, particularly upper cervical extension and rotation; and resolution or significant improvement with cervical manual therapy. Cervicogenic headache does not feature the typical migrainous phenomena of aura, photophobia, phonophobia, and nausea with the same frequency, though some overlap exists.

Evidence-Based Treatment

Cervicogenic headache responds well to targeted manual therapy directed at the upper cervical spine and suboccipital region. High-velocity low-amplitude manipulation and mobilisation of the upper cervical joints are among the most evidence-supported treatments for cervicogenic headache, with multiple randomised controlled trials demonstrating superior outcomes compared to sham and pharmacological treatments. Dry needling of the suboccipital muscles and upper trapezius addresses the myofascial trigger point component. Deep cervical flexor retraining — strengthening the longus colli and longus capitis to provide dynamic stabilisation of the upper cervical spine — is essential for preventing recurrence, as the underlying biomechanical vulnerability that loads the upper cervical structures must be addressed. Postural correction, ergonomic assessment, and sleep position advice complete the management programme. Most cases of cervicogenic headache respond substantially within three to six weeks of appropriate treatment.

References & Further Reading

  1. Bogduk N, Govind J. Cervicogenic headache: an assessment of the evidence on clinical diagnosis, invasive tests, and treatment. Lancet Neurol. 2009;8(10):959–968.
  2. Jull GA, et al. A randomised controlled trial of exercise and manipulative therapy for cervicogenic headache. Spine. 2002;27(17):1835–1843.
  3. Biondi DM. Cervicogenic headache: a review of diagnostic and treatment strategies. J Am Osteopath Assoc. 2005;105(4 Suppl 2):16S–22S.