Eye pain has dozens of possible causes, ranging from something as simple as staring at a screen too long to serious conditions that need immediate attention. 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.
Surface Pain vs. Deeper Pain
The first distinction that matters is whether the pain feels like it’s on the surface of your eye or deeper behind it. A foreign body sensation, like something is stuck in your eye, points toward a problem on the cornea (the clear front layer), such as a scratch, a trapped particle, or an infection of the cornea itself. A scratchy, gritty, or sandy feeling is more typical of conjunctivitis, the inflammation most people know as pink eye.
Deeper, aching pain that gets worse when you move your eyes suggests something going on behind the surface. This includes inflammation of the white outer wall of the eye, inflammation of the optic nerve, or an infection of the tissue around the eye. Pain that radiates into your head or worsens with eye movement is a hallmark of these deeper conditions.
Digital Eye Strain
If your eyes ache after hours on a computer, phone, or tablet, digital eye strain is the most likely explanation. Your eyes are constantly refocusing to read the tiny pixels that form text on a screen, and that repetitive muscle effort causes fatigue and aching behind the eyes. You also blink far less often when concentrating on a screen, which dries out the surface of your eyes and adds irritation on top of the muscle strain.
The result is a combination of symptoms: aching behind the eyes, blurry vision, light sensitivity, and general eye irritation. The fix is straightforward. Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. Adjusting your screen brightness and making a conscious effort to blink more also helps. If the pain stops when you take a break from screens, this is almost certainly your answer.
Dry Eye
Chronic dryness is one of the most common reasons for ongoing eye discomfort. The cornea has nerve endings sitting right at its surface, exposed to the environment. When your tear film is inadequate, either because you don’t produce enough tears or because tears evaporate too quickly, those nerve endings get triggered by temperature changes, friction, and the buildup of inflammatory molecules.
What makes dry eye tricky is that it creates a cycle. Dryness causes inflammation, and inflammation makes the nerves more sensitive, which makes the pain feel worse even when the dryness itself hasn’t changed. Breaking the cycle usually means using lubricating eye drops consistently and, in more stubborn cases, treating the underlying inflammation. Dry eye tends to be worse in air-conditioned rooms, windy environments, and during winter when indoor heating lowers humidity.
Corneal Scratches and Injuries
The cornea is one of the most nerve-dense tissues in your body, which is why even a tiny scratch produces sharp, intense pain. A corneal abrasion can happen from a fingernail, a tree branch, dust, or even rubbing your eyes too aggressively. You’ll typically feel a sudden onset of pain, tearing, and sensitivity to light. The pain often gets worse with blinking because your eyelid drags across the damaged area.
Most minor corneal scratches heal on their own within one to three days. Some people develop recurrent erosions, where the healed area reopens, often waking them up with sudden pain in the early morning hours when the eyelid sticks to the cornea during sleep.
Contact Lens Problems
If you wear contact lenses, they deserve special attention as a pain source. Overwearing lenses, sleeping in them, or poor cleaning habits can lead to a corneal infection called microbial keratitis. The CDC lists the warning signs: red and irritated eyes, pain in or around the eye that continues even after removing the lens, light sensitivity, sudden blurry vision, and unusual discharge or watering. If you notice pain that persists after taking your contacts out, don’t put them back in. That lingering pain suggests the cornea itself is damaged or infected, not just irritated by the lens.
Sinus Pressure and Referred Pain
Pain behind or around the eyes isn’t always coming from the eyes at all. Your sinuses sit directly behind your eyebrows, between your eyes, and beneath your eye sockets. When they’re inflamed or infected, the pressure can produce a deep ache that feels like it’s inside your eye. You’ll usually have other sinus symptoms too: congestion, facial pressure, or a recent cold. This type of pain tends to worsen when you bend forward or lie down, which shifts fluid in the sinuses.
Headaches That Target the Eye
Cluster headaches produce some of the most intense eye pain you can experience. The pain is sharp or stabbing, usually concentrated in, behind, or around one eye, and it can spread to the face, head, and neck. On the painful side, you may notice a red or watering eye, a stuffy or runny nostril, swelling around the eye, or a drooping eyelid. Cluster headaches come in patterns, often striking at the same time of day for weeks or months, then disappearing. Researchers believe they’re linked to the brain’s biological clock in the hypothalamus, which may explain their clockwork timing.
Migraines can also cause pain around the eyes, though the pain is usually throbbing rather than stabbing and comes with light sensitivity, nausea, or visual disturbances like flashing lights or blind spots.
Acute Glaucoma
Acute angle-closure glaucoma is rare but serious. It happens when fluid pressure inside the eye spikes suddenly because the drainage system gets blocked. The symptoms are hard to miss: severe eye pain, a bad headache, nausea or vomiting, blurred vision, halos or colored rings around lights, and a visibly red eye. This is a medical emergency. Without treatment within hours, the pressure can permanently damage the optic nerve and cause vision loss. If you experience this combination of symptoms, go to an emergency room.
Inflammation Inside the Eye
Two inflammatory conditions cause significant eye pain. Scleritis is inflammation of the sclera, the tough white outer coating of the eye. It produces severe, boring pain that worsens with eye movement and often radiates into a headache. It can threaten vision, particularly when it becomes severe enough to also inflame structures inside the eye. In those cases, the risk of vision loss, corneal damage, and glaucoma all increase substantially.
Uveitis is inflammation of the middle layer of the eye. It causes a deep ache, light sensitivity, redness, and blurred vision. Both conditions are often linked to autoimmune diseases and need treatment to prevent complications.
When Eye Pain Needs Urgent Attention
Most eye pain from dryness, screens, or mild irritation resolves on its own or with simple measures. But certain combinations of symptoms signal something more serious. Seek immediate care if your vision changes suddenly, if eye pain comes with a severe headache or fever, if light suddenly becomes painful to look at, if you see halos around lights, if you’re nauseous or vomiting alongside the eye pain, or if there’s swelling in or around the eye that prevents you from opening it. A chemical splash or an object striking the eye also warrants emergency evaluation, even if the pain seems manageable at first.