Pain behind the eye usually comes from one of a handful of common conditions, ranging from eye strain and sinus pressure to migraines and cluster headaches. The sensation can feel like deep aching, sharp stabbing, or steady pressure pushing from inside the socket. What’s causing it depends largely on how the pain behaves: how long it lasts, whether it’s on one side or both, and what other symptoms show up alongside it.
Migraines and the Trigeminal Nerve
Migraines are one of the most common reasons for pain that feels lodged behind one eye. The pain pathway runs through the ophthalmic branch of the trigeminal nerve, a major nerve that carries sensation from inside the skull. This branch specifically serves the area around and behind the eyes, which is why migraine pain so often centers there even though the problem isn’t in the eye itself.
Migraine pain is often described as throbbing, though the sensation doesn’t actually track with blood vessel changes the way people once assumed. Along with the pain, normal light becomes uncomfortable, everyday sounds feel unpleasant, and even familiar smells can turn nauseating. Moving your head worsens the pain, and many people describe a sense of unsteadiness, as if they’d just stepped off a boat. If your behind-the-eye pain comes with light sensitivity and lasts anywhere from four hours to three days, a migraine is a likely explanation.
Cluster Headaches
Cluster headaches produce some of the most intense pain a person can experience, and they strike directly in or around the eye socket. The pain is strictly one-sided, severe, and lasts between 15 minutes and 3 hours per attack. Unlike migraines, which make you want to lie still in a dark room, cluster headaches create a restless agitation. People pace, rock, or press their hands against their face because staying still feels impossible.
The telltale signs happen on the same side as the pain: the eye waters and turns red, the eyelid droops or swells, and the nostril on that side gets congested or runny. The forehead may sweat on that side only. These attacks can happen as often as eight times a day during an active cycle, or as infrequently as every other day. The cycles typically last weeks to months, then disappear entirely before returning. If your pain behind the eye is excruciating, brief, one-sided, and comes with a watery red eye, cluster headaches fit the pattern closely.
Sinus Infections
Most people think of sinus pain as pressure across the forehead or cheeks, but the sinuses directly behind and above the eyes can produce deep retro-orbital pain that mimics other conditions. The sphenoid sinus, which sits behind the eyes near the center of the skull, is particularly tricky. When it becomes inflamed, it can cause headaches of varying intensity in the area around and behind the eye, along with pain at the top or back of the head, and sometimes ear pain or drowsiness.
What distinguishes sinus-related eye pain is that it tends to worsen when you bend forward or lie down, and it often resists standard painkillers. You may also notice nasal congestion, postnasal drip, or a reduced sense of smell. A cold or upper respiratory infection in the days before the pain started is a strong clue. Isolated sphenoid sinus disease is uncommon, but it’s frequently misdiagnosed because the headache pattern doesn’t match what people expect from a “sinus headache.”
Eye Strain From Screens
Hours of screen time can produce a dull ache behind the eyes that builds gradually through the day. This happens through several mechanisms working together. Your eye’s focusing system (the muscles that adjust your lens for close-up work) gets fatigued from sustained near-distance effort, leading to blurred vision, difficulty shifting focus between near and far objects, and a heavy, tired feeling behind the eyes. At the same time, you blink less while staring at a screen, which dries out the eye surface and adds burning, irritation, and grittiness on top of the deeper ache.
Screen-related eye strain typically resolves within an hour or so after you stop the activity. If you notice that your pain appears in the afternoon, worsens during computer work, and fades by the next morning, accommodative fatigue is the most likely cause. The 20-20-20 approach helps: every 20 minutes, look at something 20 feet away for 20 seconds to let the focusing muscles relax.
Optic Neuritis
Optic neuritis is inflammation of the optic nerve, the cable that carries visual information from the eye to the brain. It causes pain behind the eye that specifically worsens when you move your eyes, along with rapid vision loss that typically reaches its lowest point within two weeks. Most cases affect one eye only and occur between the ages of 18 and 50.
The good news is that recovery tends to be strong. In one study, 72% of affected eyes recovered full visual acuity, and 92% regained vision of 20/40 or better. For many patients, at least some improvement in visual sharpness begins within three weeks, even without treatment. Recovery takes longer in people over 45, often around eight weeks, and residual impairment is more common in that age group. Optic neuritis can be an early sign of multiple sclerosis, so it’s typically followed up with brain imaging.
Thyroid Eye Disease
People with Graves’ disease, the most common cause of an overactive thyroid, sometimes develop a condition where the immune system attacks tissues inside the eye socket. The body’s own antibodies trigger inflammation in the fat pads and muscles behind the eye, causing them to swell. Because these tissues are trapped inside a rigid bony socket, the swelling has nowhere to go. Pressure builds, pushing the eye forward and creating a deep ache or pressure sensation behind it.
Along with retro-orbital pain, you may notice dry eyes, excessive tearing, redness, puffy or swollen eyelids, and sensitivity to light. Over time, the swollen muscles can stiffen through scarring, which may limit eye movement and cause double vision. If you have a known thyroid condition and develop persistent pressure behind one or both eyes, thyroid eye disease is a strong possibility worth investigating.
Acute Glaucoma
Acute angle-closure glaucoma happens when fluid pressure inside the eye spikes suddenly. It causes severe eye pain, a bad headache, blurred vision, halos or colored rings around lights, eye redness, and nausea or vomiting. This combination of symptoms comes on fast and requires emergency treatment to prevent permanent vision loss. If you’re experiencing sudden, intense eye pain with vision changes and nausea, go to an emergency room.
Warning Signs That Need Urgent Attention
Most behind-the-eye pain turns out to be something manageable, but certain patterns signal a serious problem. Sudden double vision that you’ve never experienced before, headache paired with unexplained vision loss, or a gradual decline in vision alongside a constant severe headache all warrant prompt evaluation. A headache that gets worse when lying down or bending forward could point to increased pressure inside the skull, which needs assessment even if the pain itself feels tolerable.
In general, pain behind the eye that is new and severe, came on suddenly, or is accompanied by vision changes deserves same-day medical attention. Pain that’s been building over weeks alongside slowly worsening eyesight should also be evaluated soon, even though it feels less urgent. Recurrent episodes of milder pain, especially if they follow a recognizable pattern tied to screens, stress, or congestion, are more likely something you can address with your regular doctor at a normal appointment.