Pain behind the eyes is most commonly caused by tension headaches, migraines, or eye strain from screens. Less often, it signals a sinus infection, a cluster headache, or a condition that needs prompt medical attention. The good news is that most causes are treatable once you identify what’s triggering the pain.
Tension Headaches
Tension headaches are the most frequent reason people feel pressure or a dull ache behind their eyes. The pain typically affects both sides of the head or stretches across the front of the head and settles behind the eyes. You’ll often feel tightness in your neck and shoulders at the same time.
Common triggers include stress, fatigue, poor posture, dehydration, skipped meals, jaw clenching, bright sunlight, and loud noise. If you sit at a desk all day with your shoulders hunched forward, the muscles in your neck and scalp tighten, and that tension radiates into the area around and behind your eyes. Addressing the trigger, whether it’s drinking more water, adjusting your workstation, or managing stress, usually resolves the pain without medication.
Migraines and the Trigeminal Nerve
Migraines often produce intense, throbbing pain concentrated behind one eye. The reason is anatomical: the trigeminal nerve, which is the main sensory nerve of the face, connects directly to both the eye and the blood vessels and membranes surrounding the brain. When a migraine is triggered, it activates this nerve system, which sends pain signals simultaneously to the head and the eye. That’s why eye pain can feel inseparable from the headache itself.
Migraine pain behind the eye is usually one-sided and accompanied by sensitivity to light, nausea, or visual disturbances like zigzag lines or blind spots. Episodes can last anywhere from four hours to three days. If you notice a pattern of recurring, one-sided pain behind your eye with these features, you’re likely dealing with migraines rather than tension headaches.
Digital Eye Strain
Spending hours on a computer, phone, or tablet forces your eye muscles to focus at a fixed close distance for unnaturally long periods. The result is digital eye strain (sometimes called computer vision syndrome), which produces a tired, aching feeling behind the eyes along with blurry vision, dry eyes, and neck or shoulder pain.
The simplest prevention strategy is the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. This gives your focusing muscles a brief reset. Adjusting screen brightness, reducing glare, and making sure your monitor sits at or slightly below eye level also help. If you wear glasses or contacts, your prescription may need updating for the distance you sit from your screen.
Sinus Infections
Your sinuses are air-filled cavities surrounding your eyes and nose. When they become inflamed or infected, the swelling and fluid buildup create pressure that you feel behind and around your eyes, especially when you bend forward. Most sinus-related eye pain comes with nasal congestion, facial tenderness, and sometimes a low fever or thick nasal discharge.
One sinus cavity worth knowing about is the sphenoid sinus, located deep behind the nose near the base of the skull. Infections here are uncommon (fewer than 3% of all sinusitis cases) but produce headache as the primary symptom, often with visual disturbance, because of the sinus’s close proximity to the optic nerve and several other cranial nerves. Sphenoid sinusitis requires medical treatment to prevent complications.
Cluster Headaches
Cluster headaches cause some of the most severe pain a person can experience, and it’s almost always centered behind or around one eye. Unlike migraines, these attacks are shorter but more explosive. The pain peaks within 5 to 10 minutes, with the worst of it lasting 30 minutes to 2 hours, though individual attacks can range from 15 minutes to 3 hours.
What makes cluster headaches distinctive is the pattern: they strike daily or near-daily for weeks or months (a “cluster period”), then disappear completely for at least a month before returning. The affected eye often waters excessively, turns red, or develops a droopy eyelid. The nostril on the same side may run or become stuffy, and the face can flush and sweat heavily. If this matches your experience, it’s worth bringing up with a doctor because preventive treatments exist that can shorten or lessen cluster periods.
Optic Neuritis
Optic neuritis is inflammation of the optic nerve, the cable that carries visual information from your eye to your brain. It produces a dull ache behind the eye that gets noticeably worse when you move your eyes. Some people also see flashing or flickering lights with eye movements. Vision in the affected eye may become blurry, dim, or washed out, particularly for colors.
This condition typically affects one eye at a time and is most common in adults between 20 and 40. It can be an early sign of multiple sclerosis, though it also occurs on its own. Vision often recovers over weeks to months, but the initial pain and vision changes warrant a prompt evaluation.
Thyroid Eye Disease
If you have an overactive thyroid (particularly Graves’ disease), the immune system can cause the tissues and muscles behind your eyes to swell. This swelling pushes the eyes forward, creating a feeling of pressure or aching behind the eye. In more advanced cases, the eyes may visibly bulge, and you might notice double vision or difficulty moving your eyes fully in all directions.
The concern with thyroid eye disease is that the swollen tissue can compress the optic nerve or raise pressure inside the eye, both of which threaten vision. If you have a known thyroid condition and develop new pain or pressure behind your eyes, that’s a signal to get your eyes evaluated.
When the Pain Is an Emergency
Most pain behind the eyes resolves on its own or with simple treatment. But one condition, acute angle-closure glaucoma, requires emergency care. This happens when fluid pressure inside the eye spikes suddenly because the drainage system gets blocked.
The symptoms are hard to miss: severe eye pain paired with a bad headache, blurred vision, halos or colored rings around lights, nausea or vomiting, and a visibly red eye. These symptoms come on suddenly, not gradually. If you experience this combination, go to an emergency room. Permanent vision loss can occur within hours without treatment.
Figuring Out Your Cause
A few questions can help you narrow down what’s behind your pain. Is the ache on both sides or just one? Tension headaches and eye strain tend to affect both eyes, while migraines, cluster headaches, and optic neuritis are usually one-sided. Does the pain get worse when you move your eyes? That points toward optic neuritis. Does your nose run or your eye water on the painful side? Cluster headaches are the likely culprit. Is the pain tied to long screen sessions and relieved by rest? Eye strain is the simplest explanation.
Pain that comes and goes with identifiable triggers like stress, screen time, or skipped meals is generally manageable with lifestyle adjustments. Pain that is sudden and severe, recurrent in a pattern, or accompanied by vision changes, nausea, or eye redness deserves a professional evaluation to rule out conditions that can affect your vision long-term.