Three headaches that get confused with each other

Occipital neuralgia is pain along the path of the greater or lesser occipital nerves — sharp, shock-like, often triggered by touching the scalp or moving the neck a certain way. Cervicogenic headache comes from the joints and discs of the upper neck and tends to be a steadier, one-sided ache that starts in the neck and spreads forward, often reproduced by neck movement or sustained posture rather than by touch. Migraine is a separate neurological disease entirely, usually throbbing, often with light or sound sensitivity or nausea, and frequently without any neck trigger at all. All three can produce pain behind the eye. Only one of them responds reliably to a nerve block at the back of the skull.

Why the occipital nerve can fake a migraine

Two mechanisms explain the overlap. The first is anatomic: sensory fibers from the upper cervical spine and occipital nerves converge with the trigeminal nerve’s pathway inside the brainstem, in a hub called the trigeminocervical complex, so pain that starts in the neck is genuinely felt at the front of the head and around the eye — the brain cannot always tell the two inputs apart once they merge. The second is peripheral irritation of the nerve itself, from chronic muscle tension at the base of the skull, direct trauma, or a nerve physically entrapped as it passes through the muscle and fascia at the back of the neck. The third driver is behavioral: hours of forward head posture over a phone or a screen loads the same suboccipital muscles that irritate the nerve, so the modern workday is quietly manufacturing the trigger.

The block that answers the question

An occipital nerve block — local anesthetic placed precisely along the nerve’s path — is both the fastest and the most reliable way to separate occipital neuralgia from its two imitators. Significant, prompt relief after the block, including of the pain felt behind the eye, confirms the occipital nerve as the source. Little or no relief points us back toward the neck joints or toward a migraine workup instead.

Where it comes from

Whiplash is one of the more common triggers we see — the same rapid neck deceleration that jars the cervical facet joints can stretch or irritate the occipital nerves at the same time, and a headache that starts within days of a car accident deserves this specific workup, not a generic tension-headache label. Chronic postural strain, prior neck surgery, and, less often, a structural entrapment of the nerve account for most of the rest.

Treatment beyond the diagnostic block

The posture and terrain piece

A block or an ablation quiets the nerve; it does not change the hours spent in forward head posture that keep loading it. Targeted work on neck and upper back positioning, paired with the sleep and stress management we build into every chronic pain plan, is what keeps the relief from being temporary. See sleep, movement and behavior.

Red flags that change the visit

• The worst headache of your life, sudden in onset — needs emergency evaluation to rule out a bleed, not an outpatient workup. See when it is an emergency.
• Headache with fever, neck stiffness, or confusion — rule out meningitis before anything else.
• New vision changes, weakness, or slurred speech alongside the headache — treat as a possible stroke until proven otherwise.

Common questions

Related reading

• Occipital nerve block
• Radiofrequency ablation
• Peripheral nerve stimulation
• After a car accident
• Sleep, movement and behavior