Eye pain has dozens of possible causes, ranging from something as simple as staring at a screen too long to something as serious as a sudden spike in pressure inside the eye. Most of the time, the culprit is temporary and treatable: dry eyes, digital strain, allergies, or a minor scratch on the surface of the eye. Understanding the pattern of your pain, when it started, and what else is happening alongside it can help you narrow down what’s going on.
Screen Time and Digital Eye Strain
If your eyes ache, burn, or feel tired after working on a computer or scrolling your phone, digital eye strain is the most likely explanation. You normally blink about 15 times per minute, but studies show that drops to just 5 to 7 times per minute when you’re focused on a screen. Blinking is how your eyes spread moisture across their surface, so cutting your blink rate by more than half leaves them exposed and dry. The result is that gritty, sore, fatigued feeling that builds through the day.
The 20-20-20 rule is the most commonly recommended fix: every 20 minutes, look at something 20 feet away for 20 seconds. A clinical trial of 29 symptomatic computer users found that software reminders based on this rule reduced both digital eye strain and dry eye symptoms within two weeks. The catch is that the improvement didn’t persist once people stopped following the rule, which suggests you need to make it a consistent habit rather than a short-term experiment. Making a conscious effort to blink more often while working also helps restore some of that lost moisture.
Dry Eyes and Oil Gland Problems
Your tear film has three layers: an oily outer layer, a watery middle layer, and a mucus layer that helps tears stick to the eye’s surface. Problems with any of these layers can cause chronic dryness that feels like stinging, burning, or scratchiness. One of the most common culprits is meibomian gland dysfunction, where the tiny oil-producing glands along the edges of your eyelids become clogged. Without enough oil, your tears evaporate too quickly. This is actually the leading cause of dry eye syndrome.
Symptoms of oil gland blockage include eyes that itch or burn, redness, soreness, and a persistent feeling that something is stuck in your eye. Environmental factors make it worse. Air conditioning, heating, wind, and low humidity all accelerate tear evaporation. If your eyes feel worse in climate-controlled offices or on airplanes, the environment is likely compounding the problem. A humidifier, warm compresses on the eyelids to loosen clogged oil glands, and preservative-free artificial tears can all help.
Allergies and Pink Eye
Allergic conjunctivitis hits both eyes at once with intense itching, watery swelling, and tearing. It often comes packaged with other allergy symptoms like sneezing, a scratchy throat, or a runny nose. If you notice a seasonal pattern or a clear trigger (pet dander, dust, pollen), allergies are a strong bet.
Viral and bacterial conjunctivitis, both commonly called pink eye, cause a different set of symptoms. Viral pink eye usually starts in one eye and spreads to the other within days. The discharge is watery and thin, and it often shows up alongside a cold or respiratory infection. Bacterial pink eye produces thick, yellow or green pus that can glue your eyelids shut overnight. It sometimes appears alongside an ear infection. Both types cause redness, irritation, and crusting on the lashes, but significant pain or sensitivity to light with pink eye is a signal that something more serious may be going on and warrants a closer look from a provider.
A Scratch on the Eye’s Surface
A corneal abrasion, or scratch on the clear front layer of the eye, causes sharp pain that starts suddenly. Common causes include a fingernail, a piece of sand or grit, a contact lens edge, or even rubbing your eyes too hard. Along with the pain, you’ll likely notice watery eyes, blurred vision, redness, light sensitivity, and swelling. It can feel like there’s something in your eye even after whatever caused the scratch is gone.
Minor corneal abrasions typically heal within 24 to 48 hours. Deeper scratches take longer and carry a higher risk of infection, so any scratch that doesn’t improve quickly or that came from something dirty (a tree branch, a piece of metal) needs professional attention.
Contact Lens Problems
Wearing contact lenses raises your risk of keratitis, which is inflammation of the cornea. The risk goes up significantly when lenses are worn too long, slept in, or not cleaned properly. Germs like bacteria, fungi, or even parasites can invade the cornea through microscopic gaps created by the lens.
Symptoms of contact lens-related keratitis include red, irritated eyes, pain that worsens even after you remove the lens, light sensitivity, sudden blurry vision, and unusual discharge. In severe cases, microbial keratitis can lead to permanent vision damage or the need for a corneal transplant. If your eyes hurt and you wear contacts, take them out immediately. If the pain continues after removal, that’s a red flag that the problem has moved beyond simple irritation.
Sinus Pressure Behind the Eyes
Not all eye pain starts in the eye. The sinuses sit directly behind and around the eye sockets, and when they’re inflamed or infected, the pressure can radiate into your eyes. This type of pain tends to feel deep and aching rather than sharp or surface-level. It often gets worse when you bend forward, and it usually comes with other sinus symptoms: congestion, facial pressure, postnasal drip, or a headache that wraps across your forehead.
If your eye pain lines up with a cold, allergies, or a sinus infection and there’s no redness, discharge, or vision change in the eye itself, the sinuses are a likely source. Treating the underlying congestion with decongestants, steam, or saline rinses typically relieves the eye pressure as well.
Acute Glaucoma
This is the cause most people don’t think about, but it’s the one that matters most to recognize quickly. Acute angle-closure glaucoma happens when the drainage system inside the eye gets blocked suddenly, causing fluid to build up and pressure to spike. The iris bulges forward and partially or completely seals off the drainage angle.
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 irreversible vision loss.
When Eye Pain Needs Urgent Care
Most eye discomfort resolves on its own or with simple adjustments. But certain combinations of symptoms signal something that needs immediate attention. Seek emergency care if you experience any of the following with sudden onset: severe eye pain, vision loss or double vision, floaters or flashes of light, halos around lights, a severe headache with nausea or vomiting, or any numbness, weakness, confusion, or difficulty speaking. These can indicate acute glaucoma, retinal detachment, or even a neurological event, all of which are time-sensitive.
For pain that’s mild but persistent, lasting more than a day or two without improvement, or that keeps coming back in a pattern, an eye exam can identify underlying issues like chronic dry eye, gland dysfunction, or a refractive error that’s forcing your eyes to work harder than they should.