Why Does Your Eyes Hurt? Causes

Eye pain is common, and it usually is not a medical emergency. But it can be alarming, and knowing what is causing it matters. The cause can be as simple as a dry eye or as serious as an infection or increased pressure inside the eye. This article explains the most frequent causes of eye pain, when you can treat it at home, and when you need to see a doctor immediately.

What Does the Type of Pain Tell You?

The location and feeling of the pain offer the first clues. A scratchy, burning sensation on the surface of the eye is different from a deep, throbbing ache inside the eye. Surface pain is usually linked to the cornea or the conjunctiva, the clear tissue covering the white part. Deep pain often involves the structures inside the eye, like the iris or the ciliary body.

Pain that feels like something is in your eye is often a foreign body or a scratch. A dull ache behind the eye can point to eye strain or sinus pressure. Sharp, sudden pain with vision changes is more concerning. Pay attention to whether the pain is constant or comes and goes, and whether it is worse with light or eye movement.

Why Does Your Eyes Hurt? The Most Common Causes

Several everyday conditions cause eye pain. Most are treatable and resolve without lasting damage. The most common causes fall into a few clear groups.

Dry Eye Syndrome

Dry eye is one of the most frequent causes of eye discomfort. Your tear film keeps the surface of the eye smooth and protected. When tears are insufficient or evaporate too quickly, the surface becomes irritated. This causes a gritty, burning, or stinging sensation. Many people describe it as feeling like sand in the eye.

Dry eye is more common with age, during prolonged screen use, and in dry or windy environments. Certain medications, including antihistamines and decongestants, can worsen it. Artificial tears are the standard first-line treatment. If you need them more than a few times a day, or if they do not help, see an eye care professional.

Digital Eye Strain

Staring at a screen for hours does not permanently damage your eyes, but it does make them tired and sore. When you focus on a screen, you blink less often. Reduced blinking dries the eye surface and causes fatigue in the focusing muscles. The result is aching, burning eyes, often accompanied by a headache.

The 20-20-20 rule is a simple practical measure. Every 20 minutes, look at something about 20 feet away for 20 seconds. This allows the focusing muscles to relax and encourages normal blinking. Adjusting screen brightness and positioning the screen slightly below eye level also helps.

Foreign Body or Corneal Abrasion

Dust, sand, metal shavings, or an eyelash can get trapped under the eyelid or scratch the cornea. A corneal abrasion is a scratch on the clear front surface of the eye. It causes significant pain, tearing, redness, and sensitivity to light. The eye may feel like it has something in it even after the particle is gone.

Do not rub the eye. Try blinking or using sterile saline or artificial tears to flush the particle out. If the feeling persists, or if you were working with metal or wood, see a doctor. Metal fragments can leave a rust ring that requires professional removal. Most simple abrasions heal within a day or two, but an eye care provider should evaluate deep or persistent ones.

Conjunctivitis (Pink Eye)

Conjunctivitis is inflammation of the conjunctiva. Viral and bacterial forms are contagious. Allergic conjunctivitis is not. All types cause redness, discharge, and a gritty feeling. Bacterial pink eye often produces thick yellow or green discharge. Viral pink eye usually causes a watery discharge and often accompanies a cold. Allergic pink eye is intensely itchy and often affects both eyes.

Viral pink eye generally resolves on its own within one to two weeks. Bacterial pink eye may require antibiotic drops. Allergic conjunctivitis responds to antihistamine eye drops and avoiding the allergen. If you have eye pain with vision changes, severe light sensitivity, or thick discharge, seek medical care. These symptoms can indicate a more serious infection.

When Eye Pain Signals a Serious Condition

Some causes of eye pain require urgent medical attention. You cannot always tell the difference by how the pain feels. Certain symptoms require immediate evaluation.

Acute Angle-Closure Glaucoma

This is a medical emergency. The fluid inside the eye cannot drain, and pressure inside the eye rises rapidly. Symptoms include severe eye pain, headache, nausea, vomiting, blurred vision, and seeing halos around lights. The eye may be red and the pupil may look mid-dilated and fixed.

This condition can cause permanent vision loss within hours if untreated. If you experience these symptoms, go to an emergency room immediately. This is not something to wait out or treat at home.

Uveitis

Uveitis is inflammation inside the eye, specifically in the uvea, the middle layer of the eye wall. It causes deep pain, redness, light sensitivity, and blurred vision. The pain can be dull and aching. Uveitis has many causes, including autoimmune diseases and infections. It requires evaluation by an eye specialist, and treatment usually involves steroid eye drops to control inflammation.

Optic Neuritis

Optic neuritis is inflammation of the optic nerve, the cable that connects the eye to the brain. The hallmark symptom is pain with eye movement, followed by vision loss in one eye. The pain often precedes the vision change by a few days. This condition is associated with multiple sclerosis but can occur on its own. It requires urgent neurological and ophthalmological evaluation.

Orbital Cellulitis

This is a serious infection of the tissues around the eye. It causes severe pain, swelling of the eyelids, redness, fever, and sometimes difficulty moving the eye or decreased vision. It requires immediate intravenous antibiotics in a hospital. This is a rare condition but one you cannot afford to miss.

Why Does Your Eyes Hurt? When to See a Doctor

Some eye pain resolves on its own. Some does not. You should see an eye care professional if you have any of the following signs. Do not wait to see if they improve.

• Eye pain that lasts more than a few hours despite using artificial tears
• Vision changes, including blurriness, double vision, or loss of vision
• Severe light sensitivity that makes you want to keep the eye closed
• Redness accompanied by pain (red eye plus pain is more concerning than red eye alone)
• Nausea or vomiting with eye pain
• Eye pain after an injury, especially if something hit the eye at high speed
• Pain with eye movement
• Swelling or redness of the eyelid with fever

If you wear contact lenses and develop eye pain, remove the lenses immediately. Contact lens-related infections can be aggressive. Do not reinsert the lenses until the pain has resolved and you have been evaluated if the pain persists.

What to Do When Your Eyes Hurt

For mild discomfort that does not involve vision changes, some home measures are reasonable. Rest your eyes. Close them for a few minutes. Use preservative-free artificial tears if you suspect dryness. Apply a cool, clean compress if the eyes feel hot or irritated.

Do not rub your eyes. Rubbing can worsen a corneal abrasion and introduce bacteria. Do not use redness-reliever drops for pain. These drops constrict blood vessels and reduce redness, but they do not treat the underlying cause. Overuse can cause rebound redness and mask a serious condition.

Do not wear eye makeup until the irritation resolves. Do not share towels or eye drops with others. If you use contact lenses, switch to glasses until the symptoms are gone.

Can You Prevent Eye Pain?

Prevention depends on the cause. For dry eye, use a humidifier in dry rooms, take breaks during screen work, and stay hydrated. For eye strain, adjust your workspace lighting and screen position. For injury prevention, wear protective eyewear when working with tools, chemicals, or during sports that involve projectiles.

If you wear contact lenses, follow the replacement schedule and never sleep in lenses unless your eye care provider has specifically approved it for your lens type. Always wash your hands before handling lenses. Replace lens solution according to the manufacturer’s instructions.

Regular eye exams catch problems early. Many conditions that cause eye pain, like dry eye or elevated eye pressure, can be managed before they cause symptoms. The frequency of exams depends on your age, risk factors, and whether you wear corrective lenses. An eye care professional can advise you on an appropriate schedule.

Eye pain is a symptom, not a diagnosis. Most causes are benign and self-limiting. But because sight is precious and some conditions cause permanent damage quickly, it is wise to err on the side of caution. When in doubt, get it checked.