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Eye redness

What causes eye redness and pain? 26 possible conditions

See a list of possible causes in order from the most common to the least.


Cluster Headaches

Cluster headaches are severely painful headaches that occur in cycles. They start suddenly and occur on one side of the head. Additional symptoms include face and eye redness and nausea.

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Conjunctivitis (Pink Eye)

Conjunctivitis, or "pink eye," is an infection or swelling in the eye area that causes inflammation of the conjunctiva, giving the eye a red or pink color.

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Allergies Overview

This condition is considered a medical emergency. Urgent care may be required.

An allergy is the immune system's response to a foreign substance (allergen) that is not typically harmful to a person's body. This attack response may involve inflammation, sneezing, and a host of other symptoms.

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Scleritis is severe inflammation of the sclera, the eye's outer protective layer. It usually causes pain, and can sometimes cause vision loss.

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Swelling of the uvea, the middle layer of the eye, is called uveitis. It is often associated with infections or autoimmune diseases, and can cause blurry vision, eye pain, and floaters.

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Corneal Abrasion

This condition is considered a medical emergency. Urgent care may be required.

A minor scratch to the eye's cornea is called a corneal abrasion. It can be caused by dust, contact lenses, or other foreign objects, and can sometimes develop into a serious eye condition.

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A hyphema is a collection of blood in the eye, between the cornea and the iris. It is painful, and requires immediate medical attention.

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Eyelid Turned In (Entropion)

Entropion is when your eyelid rotates inward, causing irritation, abrasion, and redness. It is common in older people, but it can also be congenital or caused by chemical burns, tracoma, or herpes zoster ophthalmicus.

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Corneal Ulcer

A corneal ulcer is an open sore that forms on the cornea. It's usually caused by an infection. Even small injuries to the eye can lead to infections.

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Dry Eye Syndrome

Dry eye syndrome is a condition in which the eyes cannot produce a sufficient amount of tears. This can lead to irritation and eye redness. Causes can include medications, allergies, and hormone replacement therapy.

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Glaucoma is a term for several eye conditions that can damage your optic nerve. It has many types, and over time it can lead to vision loss.

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Sarcoidosis is an inflammatory disease that causes granulomas, which are clumps of immune cells, to form in different organs. A skin rash is one symptom of sarcoidosis of the skin.

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Toxic Shock Syndrome

This condition is considered a medical emergency. Urgent care may be required.

Toxic shock syndrome is a rare, serious condition caused by a bacterial infection. Rash is one of several common signs for this symptom.

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Allergic Conjunctivitis

Allergic conjunctivitis is when exposure to allergens (such as mold spores or pollen) cause your eyes to become watery, red, and itchy.

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Juvenile Rheumatoid Arthritis

Juvenile rheumatoid arthritis is a form of chronic arthritis that affects children. It is a long-term autoimmune condition characterized by stiffness and swelling in the joints. Most cases of JRA are mild.

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Ankylosing Spondylitis

Ankylosing spondylitis is a form of arthritis that primarily affects your spine. It causes severe inflammation of the vertebrae that might eventually lead to chronic pain and disability.

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Weils Disease

Weil's disease is a severe form of the bacterial infection leptospirosis, which can lead to organ failure and bleeding. Symptoms include nausea, fever, headache, and jaundice.

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Ebola Virus and Disease

This condition is considered a medical emergency. Urgent care may be required.

Ebola disease is a rare, often fatal illness. One of its late-stage symptoms is a bleeding rash over the entire body.

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According to the National Rosacea Society, rosacea is a chronic skin disease that affects more than 16 million Americans. The cause of rosacea is still unknown, and there is no cure. However, res

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Measles is a very contagious infection of the respiratory system. One of its several symptoms is a sore or swollen throat.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.