Headaches behind the eyes usually come from one of a handful of common causes: migraine, eye strain, sinus inflammation, or cluster headaches. Less often, they signal something more serious like acute glaucoma or inflamed blood vessels. The location feels specific and alarming, but in most cases it traces back to the trigeminal nerve, which supplies sensation to both the brain’s protective lining and the eye itself.
Migraine and the Trigeminal Nerve
Migraine is the most common reason for recurring pain behind one or both eyes. The connection is anatomical: the trigeminal nerve innervates the eye and cornea, and it also plays a foundational role in how migraines develop. When something triggers a migraine, the trigeminal system activates, sending pain signals through the blood vessels and protective lining of the brain and through the eye simultaneously. That overlap is why so many migraine episodes feel like they’re centered deep behind the eye socket, even though the process is neurological rather than ocular.
Extreme light sensitivity affects up to 90% of migraine sufferers, which reinforces the feeling that the problem is in the eye. About a quarter of people with migraines also experience visual aura, such as shimmering lines or blind spots, before the pain hits. If your behind-the-eye headaches come with light sensitivity, nausea, or tend to throb and worsen with movement, migraine is the likely explanation.
Eye Strain From Screens
Staring at a computer or phone for hours is one of the most straightforward causes of aching pain behind the eyes. The small muscles inside your eye are constantly focusing and refocusing to read pixels on a screen, and that repetitive effort fatigues them. The result is a dull, pressure-like ache that builds over the course of a workday.
Uncorrected or undercorrected vision problems make this worse. If you need glasses or an updated prescription, your eyes work even harder to compensate, which accelerates the strain. The simplest fix is stepping away from screens regularly. The 20-20-20 rule is a good guideline: every 20 minutes, look at something 20 feet away for 20 seconds. If the headaches persist despite breaks, a vision check is a reasonable next step.
Sinus Inflammation
Two specific sinus cavities sit close enough to the eyes to cause pain that feels like it’s behind them. The ethmoid sinuses are positioned between the eyes, and the sphenoid sinuses sit deeper in the skull, behind the nasal cavity. When either of these becomes inflamed from infection or allergies, the swelling and pressure produce what’s called retro-orbital pain, a deep ache that feels like it originates inside the eye socket.
Sinus headaches typically come with congestion, facial pressure, and sometimes a fever or thick nasal discharge. The pain often worsens when you bend forward. One important distinction: many people who believe they have sinus headaches actually have migraines. Migraine can cause nasal congestion and facial pressure too. If your “sinus headaches” aren’t accompanied by discolored nasal discharge or a recent cold, migraine is worth considering.
Cluster Headaches
Cluster headaches produce some of the most intense pain in medicine, and they center directly in, behind, or around one eye. A single attack lasts anywhere from 15 minutes to 3 hours, though most run 30 to 45 minutes. The pain is sharp or stabbing and always affects just one side of the head.
What makes cluster headaches distinctive is the set of autonomic symptoms that appear on the same side as the pain: a red or watery eye, a drooping eyelid, swelling around the eye, and a stuffy or runny nostril. These attacks come in clusters, often hitting at the same time each day for weeks or months before disappearing, sometimes for a year or more. If you experience severe one-sided eye pain with any of these accompanying symptoms, you’re likely dealing with cluster headaches rather than migraine.
Acute Glaucoma
Acute angle-closure glaucoma happens when fluid pressure inside the eye spikes suddenly because the drainage system gets blocked. It causes a bad headache, severe eye pain, nausea or vomiting, blurred vision, and halos or colored rings around lights. The affected eye is often visibly red.
This is an emergency. Without prompt treatment, the elevated pressure can permanently damage the optic nerve and cause irreversible vision loss. If a headache behind your eye comes on suddenly with blurred vision and halos around lights, especially alongside nausea, get to an emergency room.
Giant Cell Arteritis
In adults over 50, a new headache behind or around the eye can signal giant cell arteritis, an inflammation of blood vessels in the head. Most people who develop it are between 70 and 80 years old. The condition can reduce blood flow to the eyes, causing sudden, painless vision loss that is usually permanent.
Warning signs include a new headache in someone over 50, scalp tenderness (especially around the temples), jaw pain while chewing, and episodes of temporary vision loss or double vision. This is considered an ophthalmic emergency because early treatment can prevent blindness.
Red Flags That Need Urgent Attention
Most headaches behind the eyes are uncomfortable but not dangerous. However, certain patterns warrant immediate evaluation:
- The first or worst headache you’ve ever had, especially if it comes on suddenly
- A new type of headache after age 50, particularly with vision changes or scalp tenderness
- Headache with fever, stiff neck, or rash, which may indicate infection or inflammation
- Headache with sudden vision loss or a pupil that doesn’t respond normally to light
- A pattern of headaches that keeps getting worse over days or weeks
A pupil that becomes dilated and unresponsive on one side is a particularly serious finding that can signal a brain aneurysm.
Relief for Common Causes
What helps depends on the underlying cause, but several approaches work across multiple headache types. Cold compresses or ice packs are effective for migraines because cold reduces inflammation and numbs the area, especially when applied early. For tension-related pain, warm compresses work better by relaxing tight muscles around the eyes, temples, and forehead.
Dehydration is one of the most common and most overlooked headache triggers. Simply drinking enough water throughout the day can prevent a significant number of headache episodes. A small cup of coffee (roughly 100 to 150 milligrams of caffeine) can also help with early migraine symptoms and tension headaches, though larger amounts may backfire and trigger rebound headaches.
For sinus-related pain, warm compresses over the affected sinuses help loosen congestion and relieve pressure. Keeping the air humid and staying hydrated thin out mucus and promote drainage.
Regular exercise reduces chronic headache frequency by lowering stress and loosening tight muscles. Relaxation techniques like deep breathing, progressive muscle relaxation, and gentle yoga can interrupt the tension cycle that feeds into eye pain. Massage therapy and acupuncture may also reduce headache frequency for some people. If screen time is a major contributor, taking consistent breaks and ensuring your workspace lighting doesn’t force you to squint are practical first steps that often make a noticeable difference within days.