Eye pain has dozens of possible causes, ranging from something as minor as a dry patch on the surface of your eye to something as urgent as a sudden spike in pressure inside the eyeball. The type of pain you feel, where exactly you feel it, and what other symptoms come with it are the biggest clues to what’s going on. Most eye pain falls into two broad categories: pain on the surface (stinging, scratching, burning) and pain deeper behind or around the eye (aching, throbbing, pressure).
Surface Pain: Stinging, Scratching, or Burning
The cornea, the clear front layer of your eye, is one of the most sensitive structures in your entire body. Bare nerve endings sit just five cell layers from the surface, closer to the outside world than nerves anywhere else. That’s why even a tiny speck of dust or a loose eyelash can produce pain that feels wildly out of proportion to the size of the irritant.
The most common surface-level causes include:
- Dry eye. A stinging, burning, or scratchy sensation, usually in both eyes. You may feel like something is stuck in your eye even when nothing is there. Left untreated over time, severe dry eye can damage the corneal surface and lead to ulcers or vision problems.
- Corneal abrasion. A scratch on the cornea from a fingernail, contact lens edge, or foreign particle. This typically causes sharp, immediate pain that worsens with blinking. Most small abrasions heal within a few days.
- Conjunctivitis (pink eye). Bacterial conjunctivitis produces redness, eyelid swelling, pain, and a thick discharge that can mat your eyelids together overnight. Viral conjunctivitis tends to cause watery discharge and is extremely contagious, spreading through hand-to-eye contact or contaminated surfaces. Allergic conjunctivitis leans more toward itching than outright pain.
Contact Lenses as a Pain Source
If you wear contacts, they deserve their own mention. Contact lens wear is directly linked to a higher risk of keratitis, which is inflammation of the cornea. The more serious form, microbial keratitis, happens when bacteria, fungi, viruses, or parasites invade the cornea because lenses were worn too long, slept in, or not cleaned properly. Symptoms include worsening pain in or around the eye that continues even after you remove the lens, light sensitivity, sudden blurry vision, and unusual discharge. In the worst cases, microbial keratitis can lead to permanent vision loss or the need for a corneal transplant.
Other contact lens complications that cause discomfort include chronic dry eye, giant papillary conjunctivitis (bumps forming under the eyelid), and new blood vessels growing onto the cornea from prolonged oxygen deprivation. If your eyes hurt and you wear contacts, removing the lenses is always the right first step.
Deep or Aching Pain Behind the Eye
Pain that feels like it’s coming from inside or behind the eyeball has a different set of causes. Inflammation inside the eye, called uveitis or iritis, produces a deep ache along with redness, light sensitivity, and sometimes blurred vision. This needs prompt treatment to prevent lasting damage.
Sinus infections are another frequent culprit. The ethmoid sinuses sit right between your eyes, and the maxillary sinuses are just below them. When these cavities become inflamed and swollen, they can create intense pressure that radiates into and around the eye socket. In rare cases, a sinus infection can extend into the orbit itself, which is a serious complication that requires immediate care.
Acute angle-closure glaucoma is one of the most urgent causes of deep eye pain. It happens when fluid drainage inside the eye is suddenly blocked, causing pressure to spike rapidly, often above twice the normal level. The symptoms come on fast: severe pain in one eye, blurred vision, halos around lights, a red eye with a fixed mid-dilated pupil, and sometimes nausea or vomiting. This is a true emergency that can cause permanent vision loss within hours if untreated.
Headache Disorders That Feel Like Eye Pain
Sometimes the eyes are perfectly healthy, but the pain feels like it’s coming from them. Several headache disorders target the area around the eye because they involve the trigeminal nerve, the same nerve that supplies sensation to the cornea and the skin around the orbit.
Migraines cause throbbing pain, light sensitivity, and sometimes nausea or visual disturbances like zigzag lines or blind spots. The pain often settles around or behind one eye. Cluster headaches are less common but far more intense. They strike in bouts lasting 15 minutes to 3 hours, reaching peak intensity within 5 to 10 minutes, and they tend to hit at the same time each day for weeks or months. On the affected side, the eye typically waters excessively, turns red, and the eyelid may droop. Cluster headaches occur most often in young and middle-aged men.
Trigeminal neuralgia is rarer but produces some of the most severe pain imaginable: sudden, electric shock-like bursts triggered by everyday actions like brushing teeth, combing hair, or even a gust of cold air hitting the face. The pain can radiate directly into the eye area.
Screen Time and Digital Eye Strain
If your eye pain is more of a dull ache or tired soreness that builds over the course of the day, especially on workdays, screen use is a likely factor. As little as two hours of continuous screen time per day increases your chance of developing digital eye strain. Symptoms include soreness, dryness, blurred vision, and headaches that tend to resolve once you step away from the screen.
A few adjustments can make a real difference. The 20-20-20 rule is the simplest: every 20 minutes, look at something at least 20 feet away for about 20 seconds. Beyond that, position your screen 4 to 5 inches below eye level so you’re looking slightly downward, set your screen contrast between 60% and 70%, increase text size to at least 12-point font, and reduce glare from windows or overhead lights. Building in a 15-minute break every two hours helps, and keeping total screen time under four hours a day, when possible, reduces symptoms further.
Red Flags That Need Immediate Attention
Most eye pain resolves on its own or with simple measures like artificial tears, removing contacts, or resting your eyes. But certain combinations of symptoms signal something that can’t wait.
- Sudden vision loss or rapid vision changes, especially if accompanied by pain or neurological symptoms like weakness or slurred speech.
- Severe pain with a red eye and blurred vision, which may point to acute glaucoma, uveitis, or a serious infection like keratitis.
- Flashes of light, a sudden burst of new floaters, or a dark curtain moving across your vision, which can indicate a retinal tear or detachment.
- A suddenly protruding eye, which may be caused by orbital cellulitis or thyroid eye disease.
- Eye trauma from a blow, puncture wound, high-speed particle, or chemical splash.
- A pupil that suddenly changes size or shape and no longer reacts to light.
- New double vision, particularly with other neurological symptoms.
Any of these warrants same-day evaluation, either at an emergency room or with an eye specialist who can see you urgently. Pain that worsens steadily over hours rather than improving, or pain that wakes you from sleep, also deserves prompt attention rather than a wait-and-see approach.