Pressure behind the eyes is most commonly caused by sinus congestion, but it can also stem from headaches, eye conditions, thyroid disease, or infections. The sensation ranges from a dull ache to intense tightness, and pinpointing the cause usually comes down to what other symptoms show up alongside it.
Sinus Congestion and Infection
The most frequent culprit is sinus inflammation. Your sinuses are air-filled pockets in the bones of your face and forehead, and several of them sit directly behind and around your eyes. The ethmoid sinuses, located between your nose and eyes, and the frontal sinuses above your eyebrows are especially likely to create that behind-the-eye pressure when they become swollen or filled with mucus.
When the lining of these sinuses gets inflamed, whether from a cold, allergies, or a bacterial infection, the normal drainage pathways narrow or close off entirely. Mucus builds up, and the resulting pressure radiates into the surrounding bone and soft tissue. You’ll typically notice the pressure worsens when you bend forward, and it often comes with a stuffy nose, facial tenderness, or a reduced sense of smell.
Most sinus pressure resolves on its own or with basic treatment. Keeping your nasal passages moist is one of the most effective strategies. Saline rinses, steam inhalation, and staying hydrated all help thin mucus and encourage drainage. Over-the-counter decongestants (in pill or spray form) reduce the swelling inside your nasal passages, and steroid nasal sprays can do the same with longer-lasting effect. If allergies are the trigger, antihistamines address the underlying cause. Facial massage along the sinus areas can also provide short-term relief.
In rare cases, a severe sinus infection can spread into the eye socket. This is called orbital cellulitis, and it’s a medical emergency. Signs include swelling and redness around the eye, pain with eye movement, bulging of the eye, decreased vision, and fever. The direction the eye bulges can even indicate which sinus is involved: a frontal sinus infection pushes the eye down and outward, while an ethmoid sinus infection pushes it sideways.
Tension Headaches and Migraines
Headaches are another common reason people feel pressure behind the eyes. Tension headaches produce a band-like tightness that often wraps around the forehead and presses into the area behind the eyes. They don’t usually cause nausea, vomiting, or visual disturbances like flashing lights or bright spots. Physical activity doesn’t make them worse, and sensitivity to light or sound is uncommon.
Migraines, on the other hand, frequently concentrate pain behind or around one eye and come packaged with other symptoms. Nausea, vomiting, sensitivity to light and sound, and visual auras (flashing lights, blind spots, zigzag patterns) are hallmarks that distinguish migraines from tension headaches. Physical movement tends to intensify migraine pain, which is why many people retreat to a dark, quiet room during an episode.
The two can be hard to tell apart, especially when a tension headache is severe or a migraine presents without its classic aura. If your behind-the-eye pressure comes with throbbing, one-sided pain, nausea, or light sensitivity, migraine is the more likely explanation.
Eye Strain
Extended screen time, reading in dim light, or uncorrected vision problems can fatigue the muscles that control focus and eye movement. This strain often registers as aching or pressure behind the eyes, sometimes accompanied by a headache across the forehead. The discomfort typically builds over hours of close-up work and eases with rest. If eye strain is a recurring problem, it may signal that your glasses or contact prescription needs updating, or that you need one for the first time.
Glaucoma
Normal eye pressure falls between 10 and 20 millimeters of mercury. When that pressure spikes, you feel it. Acute angle-closure glaucoma happens when the drainage system inside the eye gets suddenly blocked, trapping fluid and driving pressure up rapidly. The result is intense eye pain, headache, nausea and vomiting, redness, a hazy or steamy-looking cornea, and halos around lights. Vision can deteriorate quickly.
This is a medical emergency. Without treatment within hours, the sustained high pressure damages the optic nerve and can cause permanent vision loss. Open-angle glaucoma, the more common form, raises pressure gradually and usually causes no symptoms until vision is already affected, which is why routine eye exams that check pressure are important.
Optic Neuritis
Optic neuritis is inflammation of the nerve that connects the eye to the brain. It typically affects one eye and produces a distinctive dull ache behind the eye that gets worse when you move your eyes. Vision loss develops over hours to days, colors look washed out or less vivid, and some people see flashing or flickering lights with eye movement. Side vision or central vision may drop out in patches.
Most people recover at least some vision over several weeks to months. Optic neuritis is sometimes an early sign of multiple sclerosis, so it usually prompts further evaluation even after the eye symptoms improve.
Thyroid Eye Disease
People with an overactive thyroid, particularly Graves’ disease, can develop swelling of the muscles and fat tissue behind the eyes. The eye socket is a rigid bony space that doesn’t expand, so when those tissues swell, pressure builds against the eyeball, blood vessels, and nerves. This increased pressure pushes the eyes forward, a condition called proptosis, giving a wide-eyed or bulging appearance.
The swelling also compresses the small veins and lymphatic channels that drain fluid from the eye area, which leads to puffy, swollen eyelids and redness on the surface of the eye. Behind-the-eye pressure or aching, double vision, difficulty moving the eyes, and light sensitivity are common complaints. If the swelling is severe enough to compress the optic nerve, vision can be threatened.
How to Tell What’s Causing Your Symptoms
The accompanying symptoms usually point to the cause. Sinus pressure comes with congestion, facial tenderness, and sometimes a low-grade fever. Headache-related pressure follows a pattern you may recognize, with or without nausea and light sensitivity. Eye strain correlates with extended visual tasks and goes away with rest.
Certain combinations of symptoms signal something more urgent. Sudden vision loss, severe eye pain with nausea and vomiting, halos around lights, a bulging eye, pain that worsens with eye movement, or any pressure that comes with fever and redness around the eye socket all warrant prompt evaluation. Sudden onset matters too: pressure that builds over minutes to hours is more concerning than a familiar dull ache that develops over the course of a long workday.