Headache behind one eye — what it usually means
"It's behind my right eye." It is one of the most precise things a person can tell you about their headache, and one of the least diagnostic. Behind the eye is an address, not a cause. At least five common conditions deliver pain to it, and three uncommon ones that need same-day care do too.
So this article does two jobs. First it rules out the urgent things, because a couple of them can cost you vision and you should not be reading a physiotherapy blog while one of them is happening. Then it walks through what is actually likely, including the two that we treat — and the two that we don't, which we will point you at honestly.
Three causes of eye-region pain are time-critical. If any of these describe you, stop reading and get seen today:
- Severe eye pain with a red eye, blurred vision, halos around lights, and nausea or vomiting. This can be acute angle-closure glaucoma, an ophthalmic emergency that can cause permanent vision loss within hours. Emergency department, now.
- A new headache after age 50 with scalp tenderness, jaw pain when chewing, or any change in vision. This can be giant cell arteritis, which is treatable but can blind you if it is left. Same-day medical assessment.
- A bulging or swollen eye, fever, or double vision. Possible orbital infection. Urgent assessment.
Also treat as urgent: any headache that peaks within seconds, one that follows a head injury, or one that comes with weakness, numbness, slurred speech, or fever with a stiff neck.
One of those deserves an extra sentence on a site about jaw pain. Jaw pain when chewing is not automatically a jaw problem. In giant cell arteritis the chewing muscles ache because their blood supply is restricted — the pain builds as you chew and eases when you stop. If you are over 50, that pattern arrived recently, and it comes with a new headache at the temple or scalp tenderness, that is not TMJ and it is not something to book a physiotherapist for. It is a same-day medical problem. We would rather lose the appointment than have you get that wrong.
The one that gets missed for a decade
If your pain behind one eye is excruciating, comes in bouts, and has a stopwatch quality to it, read this section twice.
Cluster headache produces attacks of severe one-sided pain around or behind the eye lasting 15 to 180 minutes, with signs on the same side as the pain: a watering eye, a blocked or running nostril, a drooping or swollen eyelid, a smaller pupil, a red eye. People are typically restless during an attack — pacing, rocking — where a migraine sufferer wants to lie still in the dark. Attacks cluster daily or near-daily for weeks or months, then stop for a long stretch. Lifetime prevalence is around 124 per 100,000.
Here is why it is worth a whole section. A 2025 systematic review and meta-analysis in The Journal of Headache and Pain put the overall diagnostic delay for cluster headache at 10.43 years. In a hospital-based series, 77% were misdiagnosed at first consultation — as trigeminal neuralgia, migraine without aura or sinusitis — and patients collected an average of 2.27 diagnoses, and saw a median of three doctors, before the right one.
Cluster headache is not a physiotherapy condition. It has specific acute and preventive treatments that work, and a neurologist is the correct destination. If the description above matched you, the useful thing this article can do is tell you to name it by its name at that appointment, because a decade is a very long time to lose to a diagnosis that already has an answer.
Your sinus headache is probably not sinus
Pressure behind the eyes and across the cheeks feels sinus-shaped, so it gets called sinus. It usually isn't. In a study of nearly 3,000 people with self-reported or physician-diagnosed "sinus headache", 88% actually met the criteria for migraine. None of them had been diagnosed with or treated for migraine beforehand.
Genuine sinus headache comes with the things an infection brings: thick discoloured nasal discharge, a reduced or absent sense of smell, often fever. Facial pressure on its own, with a clear nose, is far more likely to be migraine wearing a sinus costume — and migraine has treatments that a decongestant is not.
Migraine behind the eye tends to be throbbing rather than pressing, can swap sides between attacks, is worsened by ordinary activity like climbing stairs, and travels with nausea or light and sound sensitivity. It is a neurological condition and it belongs with a doctor. We say that plainly in our guide to cervicogenic headache too: physiotherapy is not a migraine cure, and anyone promising otherwise is selling something.
How the neck delivers pain to your eye socket
This is the part most people have never had explained, and it is the reason a headache behind the eye can have nothing to do with the eye at all.
The sensory nerves from your top three neck segments — C1, C2 and C3 — arrive at a relay station in the brainstem called the trigeminocervical nucleus. So does the trigeminal nerve, which supplies your forehead, temple and the region behind your eyes. Two different sets of inputs, one shared switchboard, and nothing attached saying where the signal came from. Sustained irritation from an upper neck joint can therefore be experienced behind the eye. The pain is real and it is genuinely felt there; the source is a few inches lower and further back.
The pattern that points this way is fairly specific:
- Side-locked. The same eye every single time. It does not swap sides between episodes the way migraine often does.
- It travels. It starts at the back of the head or the neck and moves forward to the eye or temple, rather than beginning at the eye.
- Dull and pressing, rather than throbbing or pulsing.
- Provoked by position. A long stretch at a laptop, a night on the wrong pillow, or holding your head turned brings it on.
- The neck is stiff, and often turns further one way than the other.
This is a clinical picture, not a scan finding — which is why so many people with it have a clean MRI and no explanation.
Behind one eye is one of four patterns we see most often. The Headache Map lays all four out and tells you what each one usually points at — including the one that points away from us and towards your doctor.
The jaw route to the same place
The second musculoskeletal route runs through the chewing muscles. The temporalis fans across your temple; the masseter runs down the angle of your jaw. Both refer pain upward and forward, and the temporalis in particular sends it into the temple and the area around the eye.
The tell is mechanical. If the pain is worse after a hard day of concentrating, after chewing something tough, or on waking, and your jaw feels tight, clicks, or you catch yourself with your teeth clamped together at a screen, the chewing muscles are a live suspect. Our guide to TMJ and jaw pain covers what that assessment involves.
And these two routes are not rivals. The neck and the jaw feed the same brainstem relay, which is why they so often converge on one person rather than competing to be the answer. That is also why a night guard, which addresses one structure during one part of the day, so often leaves the head pain untouched — a gap we pulled apart in why your night guard didn't stop the headaches.
Telling them apart at a glance
- 15–180 minutes, then gone
- Excruciating, always the same side
- Watering eye, blocked nostril, drooping lid on that side
- Restless — pacing, can't sit still
- Bouts lasting weeks, then long gaps
- See a neurologist
- 4 to 72 hours
- Throbbing, can swap sides
- Nausea, light and sound sensitivity, sometimes aura
- Wants stillness and a dark room
- Worse climbing stairs or moving fast
- See a doctor — often mislabelled "sinus"
- Hours to days, often a background ache
- Dull, pressing, same side every time
- Starts at the back of the head or the jaw, travels forward
- Provoked by posture, chewing, or clenching
- Stiff neck, uneven rotation, tight jaw
- Worth a physiotherapy assessment
Two honest caveats. These overlap — plenty of people carry migraine and a neck contribution, and treating one leaves the other running. And no table diagnoses anyone. What it can do is stop you accepting "it's just stress" for another two years.
What to do this week
- Time one attack properly. Start and finish. Duration is the single most useful thing you can bring to any appointment, because 15–180 minutes, 4–72 hours and "a background ache all day" point in three completely different directions.
- Photograph your face during one. Sounds odd; it is genuinely useful. A drooping lid, a smaller pupil or a red watering eye on the painful side is a finding, and it will have resolved by the time you are in the room with a doctor.
- Note whether it ever changes sides. Over ten episodes. Side-locked is a real clue and almost nobody tracks it.
- Check your rotation. Sitting tall, turn your head slowly each way and compare. A clear difference between sides in someone with one-sided eye pain is worth reporting.
- Get your eyes tested if you have not recently. Uncorrected long-sightedness and astigmatism produce a genuine ache behind the eyes after screen work, and it is a cheap thing to exclude.
If the picture that fits you is the third column — same eye every time, starting at the back of the head or the jaw, worse after long postures, with a stiff neck — then the next step is an assessment of the upper neck and jaw by someone who examines both. That starts with one short call. If your obstacle is getting to a clinic, supervised online rehab is a legitimate route for this kind of problem.
Want to test the neck theory before booking anything? The Source Test is three physical checks — about three minutes — and tells you how strongly your particular combination points at the upper neck.
Frequently asked questions
This article is general information, not a diagnosis, and it cannot tell you which of these you have. Pain around the eye has causes that range from harmless to sight-threatening. If anything in the urgent lists above applies to you, seek medical care rather than booking a physiotherapist.
Same eye, every time?
If it is always the same side, starts at the back of your head or your jaw, and nobody has examined the neck underneath it — that is worth one short call. We'll tell you honestly whether this is something we can help with, or who you should be seeing instead.
Not ready for a call? See where yours starts on the Headache Map, or run the Source Test — three physical checks, about three minutes.