A headache felt in or behind your eyes is almost always referred pain, meaning the source of the problem isn’t your eyeball itself but rather nerves that send signals through the eye area. The most common culprits are eye strain, migraine, sinus inflammation, and cluster headaches. Less often, it signals something in the eye itself, like a spike in eye pressure. Understanding the pattern of your pain, how long it lasts, and what comes with it helps narrow down which type you’re dealing with.
How Pain Ends Up “In” Your Eyes
The trigeminal nerve is the main sensory nerve for your face, and it has branches that supply your forehead, sinuses, and the area around and behind your eyes. When any structure along this nerve network gets irritated or inflamed, the pain signal can converge in a cluster of neurons in your upper spinal cord called the trigeminocervical complex. Because signals from different areas all funnel through this hub, your brain can misinterpret where the pain is actually coming from. That’s why a headache originating from tight neck muscles, inflamed sinuses, or overactive brain circuits can all feel like the pain is sitting right behind your eye.
Eye Strain From Screens and Vision Problems
If your headache builds gradually during the day and gets worse the longer you read, drive, or stare at a screen, eye strain is the most likely explanation. The clinical term is asthenopia, and it causes pain in and around the eyes, fatigue, blurry vision, light sensitivity, and sometimes nausea or facial twitching. The symptoms come from your eye’s focusing muscles working overtime, particularly when you have an uncorrected or undercorrected vision prescription.
People who are slightly farsighted often don’t realize it because their eyes can compensate, but that constant compensating effort fatigues the muscles and produces a dull ache behind the eyes by afternoon. The same thing happens with convergence insufficiency, where your eyes struggle to turn inward together for close-up work. In both cases, getting the right glasses prescription is the single most effective fix.
For screen-related strain, the 20-20-20 rule is a well-tested strategy: every 20 minutes, look at something 20 feet away for 20 seconds. A study of symptomatic computer users found that following this rule significantly reduced eye strain and dry eye symptoms within two weeks. The benefit didn’t hold once people stopped taking breaks, though, so consistency matters. Adjusting screen brightness, reducing glare, and keeping your monitor at arm’s length also help.
Migraine
Migraine is one of the most common reasons for severe, recurring pain that centers around one eye. A typical migraine attack lasts 4 to 72 hours, produces pulsating or throbbing pain on one side, and gets worse with routine physical activity like walking up stairs. Most people also experience nausea, sensitivity to light, or sensitivity to sound. Some get visual aura beforehand: shimmering lines, blind spots, or flashing lights that last 20 to 60 minutes before the headache sets in.
The orbital and retroorbital area (behind the eye) is a classic location for migraine pain, and it’s common for people to initially assume they have a sinus headache or an eye problem. If your “eye headache” is moderate to severe, comes with light sensitivity or nausea, and lasts hours to days, migraine is high on the list. A diagnosis typically requires at least five lifetime episodes fitting this pattern.
Cluster Headaches
Cluster headaches are less common but unmistakable. The pain is strictly one-sided, centered behind or around one eye, and described as sharp, boring, or piercing. Attacks are intense, often rated 10 out of 10, and last between 15 minutes and three hours. They tend to strike at the same time each day, often waking people from sleep, and come in clusters lasting weeks or months before disappearing.
The hallmark feature is what happens to your eye and nose during an attack. The eye on the painful side tears up, turns red, and the eyelid may droop or swell. Your nostril on that side stuffs up or runs. Some people develop a noticeably smaller pupil on the affected side. If you’re getting excruciating pain behind one eye along with a watery, red eye and nasal congestion on the same side, this pattern points strongly toward cluster headache.
Sinus Infections
Sinusitis can produce pain around and behind the eyes, especially when the sphenoid sinus is involved. The sphenoid sits deep behind your nose, near the base of your skull, and when it’s inflamed, the headache can show up in the eye area, the top of the head, or the back of the skull. The pain typically worsens when you move your head and doesn’t respond well to standard painkillers.
What makes sphenoid sinusitis tricky is that it often doesn’t look like a typical sinus infection. A standard nasal exam appears completely normal in up to 50% of cases, so a CT scan is usually needed to catch it. If your eye headache came on with a recent cold, feels worse when bending forward, and involves facial pressure or thick nasal discharge, sinus inflammation is worth investigating.
Acute Glaucoma
This is the one cause on this list that qualifies as a medical emergency. Acute angle-closure glaucoma happens when pressure inside the eye spikes suddenly because fluid drainage gets blocked. It causes severe eye pain, a headache, redness, blurred vision, halos or rainbow rings around lights, and nausea or vomiting. Symptoms come on fast and can lead to permanent vision loss within hours if untreated.
If you’re experiencing sudden, severe pain in one eye along with vision changes and nausea, that combination warrants an emergency room visit. Acute glaucoma is far less common than the other causes here, but the stakes are high enough that it’s worth knowing the signs.
Optic Nerve Inflammation
Optic neuritis, or inflammation of the optic nerve, produces pain behind the eye that gets noticeably worse when you move your eyes side to side or up and down. This pain-on-eye-movement pattern is fairly specific. It typically comes with some degree of vision loss in the affected eye, especially reduced color vision or a blurry patch in the center of your visual field.
Optic neuritis matters because it’s closely linked to multiple sclerosis. It’s the first sign of MS in about 20% of patients and occurs at some point in nearly half of people with the condition. The risk of developing MS is higher if brain imaging at the time of the episode shows certain lesion patterns. Not everyone with optic neuritis goes on to develop MS, but the connection is significant enough that doctors typically order an MRI of the brain when optic neuritis is diagnosed.
Narrowing Down Your Type
The details of your headache are more useful than you might expect. Paying attention to a few specific features can help you and your doctor figure out what’s going on faster:
- Duration of each episode. Minutes suggest cluster headache. Hours to days suggest migraine. Constant, daily pain that waxes and wanes suggests hemicrania continua, a less common disorder that also centers around one eye.
- Quality of pain. Throbbing or pulsating points toward migraine. Sharp, stabbing, or boring pain points toward cluster headache. A dull ache that builds through the day suggests eye strain.
- One side or both. Cluster headaches and migraine are typically one-sided. Eye strain and tension headaches are usually felt on both sides or across the forehead.
- What makes it worse. Physical activity worsening the pain suggests migraine. Eye movement worsening it suggests optic neuritis. Screen time or reading worsening it suggests eye strain.
- Accompanying symptoms. Tearing and nasal congestion on one side point to cluster headache. Nausea and light sensitivity point to migraine. Vision loss or color changes point to optic neuritis. A feeling like sand in the eye is relatively specific to hemicrania continua.
If your headaches are new, worsening, or different from anything you’ve experienced before, a thorough evaluation that includes an eye exam and possibly imaging can rule out structural problems and get you to the right treatment faster.