Eye pain has dozens of possible causes, ranging from something as simple as staring at a screen too long to conditions that need prompt medical attention. The type of pain you’re feeling, where exactly you feel it, and what other symptoms come with it are the best clues to figuring out what’s going on.
Your eyes are among the most sensitive structures in your body. The cornea, the clear front surface of your eye, has one of the densest networks of nerve endings anywhere. Bare nerves sit just five cell layers from the surface, which is why even a tiny speck of dust can produce intense, disproportionate pain. Pain can also originate deeper in the eye socket, from surrounding sinuses, or even from neurological sources that have nothing to do with the eye itself.
Surface Pain vs. Deep Pain
The first useful distinction is whether the pain feels like it’s on the surface of your eye or behind it. Surface pain tends to come with burning, stinging, grittiness, or a scratchy feeling. It’s commonly caused by dryness, minor scratches, infections, or irritants like dust and contact lenses. Deep or aching pain, felt behind or around the eye, points toward conditions involving the eye socket, the optic nerve, elevated pressure inside the eye, or headache disorders.
These two categories aren’t always neat. The trigeminal nerve, the main nerve responsible for sensation in your face, also supplies the covering of your brain. That overlap means problems originating in the skull or sinuses can genuinely feel like eye pain, even when the eyes themselves are perfectly healthy.
Digital Eye Strain
If your eyes hurt after hours on a computer, phone, or tablet, digital eye strain is the most likely explanation. Studies report that anywhere from 35% to 97% of adults who use screens regularly experience some degree of it. Symptoms include aching or tired-feeling eyes, blurred vision, headache, and dry or burning sensations.
The core problem is that you blink less when focused on a screen, sometimes by as much as half your normal rate. Less blinking means your tear film dries out faster. On top of that, holding your eyes at a fixed focal distance for extended periods fatigues the small muscles that control focus. The standard recommendation is the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. Adjusting screen brightness, reducing glare, and using artificial tears can also help.
Dry Eyes and Oil Gland Problems
Chronic burning, grittiness, or soreness that doesn’t track with screen use could be dry eye disease. Your tear film has three layers: an outer oily layer, a watery middle layer, and an inner mucus layer. The oily layer is produced by tiny glands lining your eyelids called meibomian glands. When those glands don’t secrete enough oil, or the oil they produce is poor quality, tears evaporate too quickly and leave the surface of your eye exposed.
Meibomian gland dysfunction is one of the most common causes of persistent dry eye symptoms, and many people have it without realizing it. Your eye care provider can detect it during a routine exam before you notice symptoms yourself. Warm compresses applied to closed eyelids for several minutes can help soften clogged oil, and over-the-counter lubricating drops provide temporary relief.
Corneal Scratches
A corneal abrasion, or scratch on the surface of the eye, causes sharp pain, watering, redness, light sensitivity, and the persistent feeling that something is stuck in your eye. Common culprits include fingernails, makeup brushes, tree branches, sand, and contact lenses. Even a tiny scratch produces outsized pain because of the cornea’s dense nerve supply.
The good news is that the cornea heals remarkably fast. Minor abrasions typically feel significantly better within 24 to 48 hours because the surface cells reproduce quickly. Avoid rubbing the eye, and don’t try to remove a stuck object yourself if it doesn’t flush out easily with clean water or saline.
Infections and Pink Eye
Conjunctivitis (pink eye) is an infection or inflammation of the thin membrane covering the white of your eye. It causes redness, irritation, and discharge, but the type of discharge helps distinguish the cause. Bacterial conjunctivitis produces thick, yellowish or greenish pus that can mat your eyelids shut overnight. Viral conjunctivitis tends to produce a thinner, watery discharge and often starts in one eye before spreading to the other. Allergic conjunctivitis usually involves both eyes simultaneously with itching as the dominant symptom.
Bacterial cases often respond to antibiotic drops, while viral cases resolve on their own over one to two weeks. Allergic conjunctivitis improves with antihistamine drops or by removing the allergen.
Inflammatory Conditions
Two inflammatory conditions worth knowing about are uveitis (inflammation inside the eye) and scleritis (inflammation of the tough white outer wall). Scleritis produces a distinct, piercing pain that worsens when you move your eyes. The pain can be severe enough to wake you from sleep and is often accompanied by light sensitivity and deep redness that doesn’t respond to over-the-counter drops. Both conditions are sometimes linked to autoimmune diseases like rheumatoid arthritis or lupus, and both require treatment to prevent vision loss.
Acute Glaucoma
Acute angle-closure glaucoma is one of the few causes of eye pain that qualifies as a true emergency. It happens when the drainage system inside the eye gets suddenly blocked, causing pressure to spike rapidly. Symptoms come on fast and include severe eye pain, a bad headache, nausea or vomiting, blurred vision, halos or colored rings around lights, and eye redness.
This combination of symptoms, particularly pain with nausea and visual halos, is distinctive. If you experience it, you need emergency care within hours to prevent permanent vision damage. Chronic glaucoma, by contrast, is painless and develops slowly, which is why it’s often caught only through routine eye exams.
Headache Disorders That Feel Like Eye Pain
Many people with eye pain don’t actually have an eye problem. If an eye exam comes back normal, the pain may be coming from a headache disorder that happens to center around the eye.
Migraines can produce pain behind the eye, on one side of the head, or across the entire head. They often include light sensitivity, nausea, and sometimes visual disturbances like flashing lights or blind spots. Cluster headaches are more localized and intense. They strike one side of the head, typically at the temple or directly around the eye, and produce tearing, redness, and nasal congestion on that same side only. Migraines can also cause tearing and congestion, but those symptoms tend to affect both sides of the face rather than just one.
Cluster headaches follow a distinct pattern: they occur in bouts lasting weeks or months, often at the same time of day, and each episode lasts 15 minutes to 3 hours. If your eye pain follows a pattern like this, a neurologist or headache specialist can help with prevention and treatment.
Optic Neuritis
Pain that lives behind the eye and gets noticeably worse when you move your eyes in any direction could signal optic neuritis, which is inflammation of the optic nerve. The pain is often described as a dull ache felt deep in the socket or around the brow. Most people also notice vision changes: colors may look washed out, or vision in one eye becomes blurry or dim over days.
Optic neuritis is significant because it can be an early sign of multiple sclerosis. Not everyone who develops it will go on to have MS, but it warrants a neurological workup, including brain imaging, to check for other signs of nerve inflammation.
How to Narrow Down the Cause
A few questions can help you and your provider zero in on what’s happening:
- How long has it lasted? Pain that started in the last hour or two and is getting worse suggests something acute like a scratch, foreign body, or angle-closure glaucoma. Pain that’s been present for days or weeks points to dryness, strain, or a chronic condition.
- Does it hurt more when you move your eyes? Pain with eye movement is a hallmark of scleritis and optic neuritis.
- Is your vision affected? Any sudden change in vision alongside eye pain raises the urgency significantly.
- Is there discharge? Thick, colored discharge suggests infection. Watery eyes without discharge lean toward dryness, allergies, or a scratch.
- Does the pain follow a pattern? Recurring episodes at predictable times or in clusters suggest a headache disorder rather than an eye condition.
Most eye pain turns out to be strain, dryness, or a minor irritation that resolves with simple measures. But sudden, severe pain, especially paired with vision changes, nausea, or halos around lights, needs same-day evaluation.