Eye pain has dozens of possible causes, ranging from something as minor as a dry or tired eye to something as serious as acute glaucoma. The type of pain you feel, where exactly you feel it, and what other symptoms come with it are the best clues to what’s going on. Most eye pain falls into two broad categories: pain on the surface of the eye and pain that feels deeper, behind or around it.
Surface Pain vs. Deep Pain
Surface-level eye pain usually involves the cornea, the clear front layer of the eye. The cornea is packed with nerve endings, which is why even a tiny scratch or speck of dust can produce intense, sharp pain. Conditions like corneal abrasions, infections, and foreign bodies are the most common causes of this kind of pain, and they typically come with redness, watering, and light sensitivity.
Deep or aching pain that feels like it’s behind the eye points to a different set of causes. Inflammation, infection, or pressure changes inside the eye socket can all produce this sensation. Other clues that the problem is deeper include pain that worsens when you move your eyes, double vision, or a bulging appearance to the eye. Sinus infections can also create pressure and pain that feels like it’s coming from behind the eyes, even though the source is inflamed sinus cavities surrounding the eye socket.
Dry Eyes and Digital Strain
If your eye pain is more of a burning, stinging, or gritty feeling, dry eye syndrome is one of the likeliest explanations. It tends to affect both eyes and often feels like something is stuck in your eye even when nothing is there. People who spend long hours at screens, live in dry climates, or take certain medications (like antihistamines) are especially prone to it.
Screen use makes things worse because you blink less when staring at a monitor or phone. To reduce strain, position your screen about an arm’s length away with the top of the monitor at or just below eye level. Take regular breaks to look at something farther away. Adjusting overhead lighting and using an anti-glare screen cover can also help. If you work in an office with forced air, moving your chair away from vents reduces the dry air blowing across your eyes.
Scratched Cornea
A corneal abrasion is one of the most common reasons for sudden, sharp eye pain. It can happen from a fingernail, a piece of grit, or even rubbing your eyes too hard. Symptoms include intense pain, the feeling that something is stuck in your eye, tearing, redness, blurred vision, and sensitivity to light. The good news is that minor scratches heal quickly. Most people feel significantly better within 24 to 48 hours because the cells on the cornea’s surface reproduce very fast. Larger scratches take longer but still tend to heal well with proper care.
Contact Lens Problems
Wearing contact lenses longer than recommended, sleeping in them, or not cleaning them properly can lead to a corneal infection called keratitis. Symptoms include eye pain, redness, blurred vision, light sensitivity, excessive tearing, and discharge. The CDC recommends removing your contact lenses immediately if you notice unusual eye irritation and calling your eye doctor. Keratitis from contact lens misuse is one of the more preventable causes of serious eye pain.
Inflammation Inside the Eye
Uveitis is inflammation of the middle layer of the eye wall. The most common form, anterior uveitis, causes pain, redness, blurred vision, and sensitivity to light. You may notice your pupil looks irregular instead of perfectly round. In some cases, a visible white fluid collects at the bottom of the front of the eye. Uveitis can be triggered by infections, autoimmune conditions, or eye injuries, though sometimes no clear cause is found. It requires prompt treatment to prevent lasting damage to vision.
Headaches That Target the Eye
Some headache disorders produce pain that centers on one eye. Cluster headaches are the most dramatic example. The pain is typically burning, sharp, or stabbing, hits its peak within 5 to 10 minutes, and lasts anywhere from 15 minutes to 3 hours. It strikes on one side of the face, running from the neck to the temple and often concentrating around the eye. On the affected side, the eye may swell, tear excessively, turn red, or develop a droopy eyelid. Cluster headaches tend to occur daily or almost daily for weeks or months at a time, then disappear before returning in another cycle.
Migraines can also cause pain around or behind one eye, though the quality is usually more throbbing than stabbing, and they come with their own set of features like nausea, aura, and sensitivity to sound.
Acute Glaucoma
Acute angle-closure glaucoma is one of the true emergencies that can start with eye pain. It happens when the drainage system inside the eye gets suddenly blocked, causing pressure to spike rapidly. Symptoms 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 the nausea and halos, distinguishes it from less dangerous causes. Without treatment within hours, acute glaucoma can permanently damage the optic nerve and cause vision loss.
Sinus-Related Eye Pain
The sinuses sit directly above, below, and behind the eye sockets. When they become infected or severely inflamed, the pressure and swelling can produce aching pain that feels like it’s coming from the eye itself. This kind of pain usually worsens when you bend forward, is accompanied by nasal congestion or facial pressure, and may affect both sides. In rare cases, a severe sinus infection can spread to structures near the optic nerve, particularly through certain air cells in the back of the sinuses that sit close to the nerve pathway. This is uncommon but underscores why persistent sinus infections with vision changes deserve medical attention.
Symptoms That Need Urgent Attention
Most eye pain resolves on its own or with simple measures. But certain combinations of symptoms signal something that needs immediate care:
- Severe pain with nausea or vomiting, which can indicate acute glaucoma
- Sudden vision loss or double vision
- Halos around lights that appear suddenly
- Blood or pus discharging from the eye
- Pain after a direct injury to the eye
- A sudden, severe headache accompanying the eye pain
- Swelling in or around the eye
Pain that worsens with eye movement, especially when paired with changes in color vision or visual clarity, can point to optic nerve inflammation. This combination typically needs evaluation within a day rather than waiting to see if it improves on its own.