One neck muscle refers pain behind your eye. Nobody has pressed it.

STERNOCLEIDOMASTOID SPASM

The sternocleidomastoid is one muscle running from behind your ear to your collarbone. It refers pain into the forehead, the eye, the ear and the jaw, and it produces dizziness. It is behind a startling amount of head pain that gets investigated everywhere except the neck.

Where does sternocleidomastoid pain spread?

The sternocleidomastoid does not hurt where it is. Its referral pattern (where it sends pain) reaches places nobody links to a neck muscle. These are the forehead and brow, deep behind the eye, the ear and the area around it, the cheek and jaw, and the top of the head.

That is why people with this end up seeing ophthalmology for eye pain, ENT for ear pain, and dentistry for jaw pain. It is also why the muscle itself is rarely examined. Someone pressing on it and bringing on the headache is often the first useful thing that has happened.

Can a tight sternocleidomastoid cause dizziness?

Sternocleidomastoid dysfunction is associated with disequilibrium, a sense of being unsteady. There is a real anatomical reason. The muscle is dense in proprioceptors. These are sensors that feed head-position data into the balance system. It is also the muscle from which cervical vestibular evoked myogenic potentials are recorded.

So an irritable sternocleidomastoid can produce both head pain and unsteadiness. That is an unusual combination, and a useful one for diagnosis. It is also one that gets worked up as a vestibular (inner-ear balance) problem when the neck was never examined.

What causes sternocleidomastoid pain?

• Sustained head-forward posture, which is the whole of work-pattern neck pain.
• Whiplash, where it is loaded rapidly and eccentrically (while lengthening under load).
• Mouth breathing and chronic cough. Both recruit it as an accessory breathing muscle.
• Compensating for a stiff or fused segment lower down. This is common after cervical fusion.
• Habitually cradling a phone, or sleeping with the head rotated.

The honest state of the evidence

This is worth saying plainly. The referral patterns of the sternocleidomastoid are described in detail in the myofascial (muscle and fascia) literature. They are consistent in clinical practice. But the trial evidence supporting specific treatments for it is thinner than for the joint-based diagnoses on this site.

What has been studied reasonably is dry needling and trigger point work for neck-related myofascial pain. Randomized comparisons show benefit against control. That is a real but modest evidence base. We present it as such, without dressing it up.

How do you relieve sternocleidomastoid pain?

Manual work and specific stretching come first. They target the postural driver, not the muscle in isolation. Treating a muscle that is compensating for something else buys weeks.

Sometimes a discrete trigger point reproduces the referred pattern. There, a trigger point injection or dry needling is reasonable. It often produces immediate change that confirms the diagnosis. Botulinum toxin is reserved for true dystonic involvement, not ordinary spasm. That difference is on the dystonia page.

And the segment underneath gets examined. Say C2-3 is stiff or fused. A sternocleidomastoid working overtime for that reason will keep failing until that is addressed.

How do I find a sternocleidomastoid trigger point?

Turn your head away from the side you want to test. The muscle stands out as a cord from behind the ear down to the collarbone. Pinch it gently between finger and thumb along its length, rather than pressing into the neck. There are structures underneath it you should not be compressing.

A tender spot that reproduces your headache, your eye pain or your ear pain is the finding. Say touching a neck muscle recreates a symptom you have been investigating elsewhere for a year. That is worth taking to an appointment.

What it is not

It is not a substitute diagnosis for things that need excluding. New-onset headache over fifty needs temporal arteritis considered. Unsteadiness with any neurological sign needs the cord considered. And a torticollis that came on suddenly, particularly in a child or after a new medication, is a different problem entirely.

Why one muscle produces so many symptoms

Its referral pattern is unusually wide for a single muscle: forehead, behind the eye, the ear, the jaw, the top of the head, and the throat. It also has autonomic effects (effects on the automatic nervous system). These include tearing, a blocked-feeling ear, and a sense of dizziness. That dizziness is not true vertigo, but it reads as vertigo to the patient.

That spread is why the workup so often goes to the eye, the ear or the sinuses first. It is also why several negative specialist opinions can pile up before anyone examines the neck. The muscle sits in plain view the whole time.

What keeps it going

Head-forward posture at a screen keeps this muscle shortened for hours a day. So do a habitual phone-to-shoulder position, mouth breathing, and a low chair with a high monitor. Treating the muscle without changing what loads it gives relief that lasts until the next work week.

How we treat it

Manual treatment of the muscle itself, taught so you can continue it. Load correction, because the muscle shortens for a reason. Treating it without changing what shortens it buys weeks. And where the trigger points are dense and reproducible, direct needling. That is a well-established treatment for myofascial pain, and it gives faster change than manual work alone.

Sometimes the muscle is part of a broader pattern, such as a dystonic pull, or a headache with an upper cervical joint component. Then treating it in isolation gives partial relief. That partial response is worth noticing, because it usually means the muscle is real and secondary, not the whole story.

What we check alongside it

• The upper cervical joints, which refer into the same head and face territory.
• The jaw, because the referral zones overlap heavily and both are often involved.
• Breathing pattern, because accessory-muscle breathing keeps this muscle working all day.
• Whether there is a sensory trick, which changes the diagnosis entirely.

What people ask about neck muscle pain in the head

Can a neck muscle really cause pain behind my eye?

Yes, and the sternocleidomastoid is the most common one to do it. The referral pattern is well described and reproducible. Pressing the muscle often recreates the exact headache. Myofascial neck pain.

Why do I feel dizzy as well?

The muscle is rich in position sensors that feed the balance system. Disturbed input from it produces unsteadiness, not true spinning vertigo. The difference between those two words matters for diagnosis. Headache that starts in the neck.

Is stretching enough?

Sometimes, if the postural driver is addressed at the same time. Stretching a muscle that is compensating for a stiff segment below it gives temporary relief. It also gives reliable recurrence. Which exercises help, and which make it worse.

Is this the same as cervical dystonia?

No. Dystonia is involuntary contraction from a neurological disorder. It comes with a typical sensory trick. Ordinary spasm is a muscle responding to load and posture. They are treated differently. Cervical dystonia.

Can the sternocleidomastoid cause pain behind the ear or in the jaw?

Yes. The muscle runs from behind the ear down to the collarbone. Its pain pattern reaches the ear and the area around it, the cheek and the jaw, the forehead, and behind the eye. It can also cause tearing and a blocked-feeling ear. That is why people often see ENT or a dentist first, and the neck muscle is rarely pressed.

Do trigger point injections help sternocleidomastoid pain?

They can. Sometimes pressing one tight spot reproduces your pain pattern. Then a trigger point injection or dry needling is a reasonable next step. The change is often immediate, which also confirms the diagnosis. Dry needling has randomized trials showing benefit over control. That is a real but modest evidence base. Botox is kept for true dystonia, not ordinary spasm.

Why does my sternocleidomastoid pain keep coming back?

Usually because whatever loads the muscle has not changed. Head-forward posture at a screen, cradling a phone on the shoulder, mouth breathing, and a low chair with a high monitor keep it shortened for hours a day. It also works overtime when a joint below it, such as C2-3, is stiff or fused. Until that driver is fixed, relief lasts weeks.

When is head or neck pain not from this muscle?

Some causes have to be ruled out first. A new headache after age fifty needs temporal arteritis considered. Unsteadiness with any neurological sign needs the spinal cord checked. A twisted neck that comes on suddenly, especially in a child or after starting a new medication, is a different problem entirely and needs its own workup.

Related reading

• Cervical dystonia
• Vestibular testing
• Work-pattern neck pain
• Cervicogenic headache
• Occipital nerve block
• Botox for neck and headache