Pain behind the eye usually comes from one of a handful of common causes: eye strain, sinus pressure, migraines, or cluster headaches. Most cases resolve on their own or with simple changes, but certain combinations of symptoms signal something more serious. Understanding what’s behind the pain helps you figure out whether to adjust your screen setup or head to an emergency room.
Eye Strain From Screens
The most common and least worrisome cause is digital eye strain. When you stare at a computer, phone, or tablet, your eyes constantly refocus to read the tiny pixels that make up on-screen text. That nonstop adjustment fatigues the muscles controlling your focus and can produce a dull ache behind one or both eyes. Low contrast between text and background makes your eyes work even harder, and glare from windows or overhead lights compounds the problem.
There’s also a blinking issue. You normally blink around 15 to 20 times per minute, but screen use drops that to about three to seven times per minute. You may not even fully close your eyes during those reduced blinks. The result is drier, more irritated eyes that ache deeper in the socket. Positioning your monitor about four to five inches below eye level, reducing glare with curtains or dimmer bulbs, and following the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds) can make a noticeable difference.
Migraines and Cluster Headaches
If the pain behind your eye is intense, one-sided, and comes with sensitivity to light or nausea, a migraine is a likely culprit. Migraine pain often settles behind one eye or in the temple and can last anywhere from a few hours to three days. Some people also see auras (flashing lights, zigzag lines, or blind spots) before the headache peaks.
Cluster headaches are rarer but far more severe. They cause extreme, sharp, or stabbing pain in, behind, or around one eye, sometimes spreading to the face and neck. Episodes tend to arrive in “clusters” over weeks or months, often at the same time of day or night. The pattern suggests a link to the brain’s biological clock, specifically the hypothalamus, which helps regulate sleep-wake cycles. During an attack, the affected eye may tear up, the eyelid may droop, and the nostril on that side may become congested or runny. If this description matches what you’re feeling, a neurologist can help with both prevention and treatment.
Sinus Infections
A standard sinus infection typically causes pressure across the forehead or cheeks. Pain felt deeper behind the eye, however, often points to the sphenoid sinus, a cavity tucked deep inside the skull behind the nasal passages. A sphenoid sinus infection doesn’t usually produce the classic stuffy or runny nose. Instead, it’s more likely to cause headaches, facial pain or numbness, sensitivity to light, and sometimes double vision. Because these symptoms overlap with more serious conditions, a sphenoid sinus infection is worth getting checked even though it’s treatable with standard approaches.
Nerve-Related Causes
The trigeminal nerve carries sensation from your face to your brain through three branches. The top branch, called the ophthalmic branch, serves the area around the eye. When this nerve malfunctions, a condition called trigeminal neuralgia, it can fire sudden, shock-like jolts of pain around the eye lasting a few seconds to several minutes. The pain is almost always one-sided and can be triggered by ordinary actions like chewing, talking, or even a light breeze on the face.
Trigeminal neuralgia feels distinctly different from a migraine or cluster headache. The pain is electric and brief rather than throbbing and sustained. Doctors diagnose it mainly by your description of the episodes, after ruling out other possibilities like shingles-related nerve pain or jaw joint problems.
Optic Nerve Inflammation
Pain behind the eye that gets worse when you move your eyes, especially side to side, may indicate inflammation of the optic nerve. This condition typically causes vision loss in one eye that worsens over hours to days, often affecting the center of your visual field first. Most people also notice colors appearing washed out in the affected eye.
Optic nerve inflammation is significant because it’s sometimes an early sign of multiple sclerosis. Not everyone who experiences it will develop MS, but it warrants a prompt evaluation with imaging and sometimes a neurological workup. Most episodes improve on their own over several weeks, though treatment can speed recovery.
Thyroid Eye Disease
An overactive thyroid, particularly Graves’ disease, can trigger the immune system to attack the muscles and tissues surrounding the eyes. This causes swelling behind the eye sockets, pushing the eyes forward and creating a feeling of constant pressure. In more advanced cases, the swelling can compress the optic nerve and lead to vision loss. If you have a known thyroid condition (or symptoms like unexplained weight loss, rapid heartbeat, and anxiety) along with bulging eyes and pain behind them, the connection is worth investigating.
When the Pain Is an Emergency
Most behind-the-eye pain is uncomfortable but not dangerous. A few specific scenarios, however, require immediate medical attention.
Acute angle-closure glaucoma happens when fluid inside the eye becomes trapped, causing pressure to spike rapidly. Symptoms include severe eye pain, redness, sudden vision loss, seeing rainbow-colored halos around lights, and nausea or vomiting. This is a true emergency because permanent vision damage can occur within hours without treatment.
Beyond glaucoma, seek emergency care if your eye pain:
- Is severe and accompanied by a headache, fever, or increased light sensitivity
- Comes with sudden vision changes
- Involves nausea or vomiting
- Follows an eye injury or chemical exposure
- Is paired with swelling in or around the eye
- Makes it difficult to move or open the eye
- Includes blood or pus from the eye
Narrowing Down Your Cause
A few questions can help you sort through the possibilities. Is the pain on one side or both? One-sided pain points toward migraines, cluster headaches, or trigeminal neuralgia. Does it worsen when you move your eyes? That’s characteristic of optic nerve inflammation. Does it follow hours of screen time? Eye strain is the simplest explanation. Is it accompanied by nasal congestion, fever, or facial pressure? A sinus infection is likely.
Pay attention to timing, too. Pain that appears at the same time each day for weeks suggests cluster headaches. Pain that builds gradually over hours and comes with light sensitivity leans toward migraine. Brief, electric jolts point to nerve pain. And sudden, severe pain with vision changes warrants a trip to the emergency room, not a wait-and-see approach.