Why does the outer corner of my eye hurt

Medically Reviewed by Whitney Seltman, OD on August 26, 2020

Nearly everyone has had sore eyes at some point. Sometimes they get better on their own, but they can also be a sign of something more serious.

Your eye doctor can figure out what's going on and find the right treatment for you.

Sometimes discomfort or pain results from a problem in your eye or the parts around it, such as:

  • Cornea: The clear window in the front of your eye that focuses light
  • Sclera: The whites of your eyes
  • Conjunctiva: The ultra-thin covering of your sclera and the inside of your eyelid
  • Iris: The colored part of your eye, with the pupil in the middle
  • Orbit: A bony cave (eye socket) in your skull where the eye and its muscles are located.
  • Extraocular muscles: They rotate your eye.
  • Nerves: They carry visual information from your eyes to your brain.
  • Eyelids: Outside coverings that protect and spread moisture over your eyes.

Blepharitis: An inflammation or infection of the eyelid which typically is not painful

Conjunctivitis (pinkeye): This is inflammation of the conjunctiva. It can be from allergies or infections (viral or bacterial). Blood vessels in the conjunctiva swell. This makes the part of your eye that’s usually white look red. Your eye could also get itchy and gunky. This condition is typically not painful.

Corneal abrasions: That’s the official name for a scratch on this part of your eye. It sounds minor, but it can hurt. It’s easy to do, too. You can scratch your eye while rubbing it. Your doctor will give you antibiotic drops. It should get better in a couple of days without further problems.

Corneal infections (keratitis): An inflamed or infected cornea is sometimes caused by a bacterial or viral infection. You may be more likely to get it if you leave your contacts in overnight or wear dirty lenses.

Foreign bodies: Something in your eye, like a bit of dirt, can irritate it. Try to rinse it out with artificial tears or water. If you don’t get it out, it can scratch your eye.

Glaucoma: This family of conditions causes fluid to build up in your eye. That puts pressure on your optic nerve. If you don’t treat it, you could lose your sight. Most of the time there are no early symptoms. But a type called acute angle-closure glaucoma causes pressure inside your eye to rise suddenly. Symptoms include severe eye pain, nausea and vomiting, headache, and worsening vision. This is an emergency. You need treatment ASAP to prevent blindness.

Iritis or uveitis: An inflammation inside your eye from trauma, infections, or problems with your immune system. Symptoms include pain, red eye, and, often, worse vision.

Optic neuritis: An inflammation of the nerve that travels from the back of the eyeball into your brain. Multiple sclerosis and other conditions or infections are often to blame. Symptoms include loss of vision and sometimes deep discomfort when you look from side to side.

Sinusitis: An infection in one of your sinuses. When pressure builds up behind your eyes, it can cause pain on one or both sides.

Stye: This is a tender bump on the edge of your eyelid. It happens when an oil gland, eyelash, or hair follicle gets infected or inflamed. You may hear your doctor call it a chalazion or hordeolum.

Eye pain can happen on its own or with other symptoms, like:

  • Less vision
  • Discharge: It can be clear or thick and colored
  • Foreign body sensation -- the feeling that something is in the eye, whether real or imagined
  • Headache
  • Light sensitivity
  • Nausea or vomiting
  • Red eye or pinkeye
  • Tearing
  • Your eye is crusted shut with discharge when you wake up.

Other symptoms along with sore eyes can be a clue to what is causing the pain.

See your eye doctor if you have eye pain, especially if you have less vision, headache, or nausea and vomiting.

Eye doctors use a variety of tools to diagnose eye pain:

  • A slit-lamp exam uses bright light to look at all the structures of your eye.
  • Dilating drops expand your pupil to let the doctor see deep into your eye.
  • A tonometer is a tool that measures eye pressure. The doctor uses it to diagnose glaucoma.

Just as causes can vary, so do treatments. They target the specific cause of eye pain.

Conjunctivitis: Antibacterial eyedrops can cure bacterial conjunctivitis. Antihistamines in the form of eyedrops, a pill, or a syrup can improve conjunctivitis from allergies.

Corneal abrasions: These heal on their own with time. Your doctor might prescribe an antibiotic ointment or drops.

Glaucoma: You’ll get eyedrops and maybe pills to reduce pressure. If they don't work, you may need surgery.

Infected cornea: You may need antiviral or antibacterial eyedrops.

Iritis: The doctor will treat this with steroid, antibiotic, or antiviral eyedrops.

Optic neuritis: It's treated with corticosteroids.

Styes: Use warm compresses at home for a few days.

The only way to sort out the causes of eye pain and to get the right treatment is to see a doctor. Your vision is precious. Protect it by taking eye pain seriously.

Conditions causing localized pain in the corner of the eye are,

  • Dacryocystitis.

  • Blepharitis.

  • Pterygium and Pinguecula.

  • Stye.

  • Foreign body.

What Is Dacryocystitis?

Dacryocystitis is the infection of the lacrimal sac. The lacrimal sac is present in the inner corner of the eye and is responsible for the drainage of tears into the nasolacrimal duct. Tears produced are essential for lubricating the eye surface and maintaining it free of microorganisms, dust, and dirt. It is common in children and is called congenital dacryocystitis. The infection of the lacrimal sac is caused due to the blockage in the duct, thus giving way for bacteria to accommodate the sac causing infection. The duct gets blocked because of many reasons, and they are,

  • Nose or eye injury.

  • Presence of nasal polyps (non-cancerous growth seen along the inner lining of the nasal cavity).

  • Sinusitis (inflammation of the layers of sinus structures).

  • Surgery of the nose or sinus.

  • Cancer.

Dacryocystitis condition presents with symptoms like,

  • Pain and redness in the corner of the eye.

  • Swelling in the corner of the eye.

  • Pus discharge from the eye.

  • Fever.

To diagnose the underlying cause, the doctor will ask the patient to undergo computed tomography (CT scan). The first line of treatment for dacryocystitis is the use of antibiotics. In milder cases, oral antibiotics are preferred, and intravenous injections of antibiotics are preferred in severe cases. To ease the swelling, warm compresses will be advised. After the condition subsides completely, a dacryocystorhinostomy procedure is suggested to widen the duct to avoid future infections. Meningitis (inflammation of the layers of the brain) and brain abscess are a few of the complications seen with untreated dacryocystitis.

What Is Blepharitis?

The inflammation of the eyelids is called blepharitis. It will usually involve both the eyes and the lid's edges. Blepharitis is caused by the obstruction of the oil glands at the base of the lashes, causing irritation and redness. It is always associated with other conditions and is one of those which are believed to be the cause.

Common conditions associated with blepharitis conditions are,

  • Rosacea - It is seen as a red and burning condition of the eye caused by the rosacea condition of the skin.

  • Dry Eyes - This condition is caused by the inadequate production of tears which is essential to lubricate the surfaces of the eye. A burning sensation is a common sign.

  • Eyelash Mites - These are tiny bugs found in the eyelashes and are believed to be caused by the rosacea condition.

  • Seborrheic Dermatitis - A condition of the itchy scalp caused by stress, detergents, chemicals, and soaps.

  • Allergies due to eye drops, eye makeup, and contact lens solutions.

  • Clogged oil glands of the eyelids.

Blepharitis condition will present with symptoms like,

  • Pain and redness of the eye.

  • Tearing eyes.

  • Swollen eyelids.

  • Frequent blinking of the eye.

  • Blurred vision.

  • Burning sensation.

  • The eyes are sensitive to light.

  • The skin around the eyelids starts to flake.

Microscopic examination and swab (skin) test are the standard diagnostic methods used for assessing blepharitis.

Antibiotics to fight the infection, steroids for inflammation and topical Cyclosporine to ease the overall blepharitis condition are the line of treatment. The underlying conditions should be treated as well.

Pink eye, stye, severe dry eyes, and tearing are the complications of untreated blepharitis.

What Are Pterygium and Pinguecula?

Pinguecula is a yellowish growth in the conjunctival layer of the eye, and the pinguecula can become severe and form a fleshy tissue containing blood vessels called pterygium. Pinguecula is formed by the deposition of protein, calcium, and fat. Both pinguecula and pterygium are believed to be caused by ultraviolet radiation, wind, and dust.

Pinguecula and pterygium will present with symptoms like,

  • Itchy eyes.

  • Swelling and redness of the affected site.

  • Burning sensation.

  • A feeling of something stuck in the eye.

  • Blurry vision.

Generally, treatment is not required for pinguecula and pterygium. But in cases where vision is obstructed, treatment is needed.

  • Lubricating drops will be prescribed to ease the itchy and irritant eye.

  • Steroidal eye drops will be given to heal the swelling and redness of the eyes if present.

  • Surgery is needed if the growth of the tissue is increasing. Pterygium will be removed and replaced with healthy tissue to avoid future pterygium growths.

What Is a Stye?

A stye is nearly like acne or a pimple formed due to the blockage of oil glands on the edges of the eyelids. A stye is a reddish bump on the edges of the eyelid.

There are two types of styes: the external styes (present on the outer layer of the eyelids) and the internal styes (present on the inner layer of the eyelids).

It is caused by the bacterial infection of oil glands present near the edges of the lid. The most common symptoms of a stye are,

  • A red bump on the edges of the lid.

  • Pain and redness.

  • Swelling of the lid.

  • Sensitive to light.

  • Tearing eye.

  • A feeling of something present in the eye.

This condition can be treated at home with warm compresses and cleaning the eyelids with eyelid wipes bought from drug stores.

How Can a Foreign Body Cause Pain in the Eyes?

Foreign bodies like eyelashes, metal, glass, sand, and dust may get into the eye and cause pain and irritation. Tears are generally produced as a defense mechanism to wash out the foreign body.

If a foreign body is present, the eye will show signs like,

  • Pain.

  • Redness.

  • Blurred vision.

  • A feeling of something present in the eye.

  • Sensitive to light.

In most cases, these foreign bodies can be removed by flushing the eye with clean running water.

Conclusion

Most of the conditions resulting in the pain in the corner of the eye can be treated with warm compresses and eye drops. However, if the condition does not resolve in a few days, consulting an ophthalmologist to treat the disease is a must.