Pink Eye

What is pink eye?

Pink eye (conjunctivitis) is a common condition. Pink eye happens when the inside of the eyelid (conjunctiva) and whites of the eyes become inflamed from viruses, bacteria or irritants. This inflammation makes blood vessels more visible, making the whites of the eye appear pink or reddish.

When caused by viruses or bacteria, pink eye is highly contagious. Allergic conjunctivitis is not contagious.

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What causes pink eye?

  • Allergens such as dust mites and pet dander
  • Bacterial infection
  • Irritants such as smog or swimming pool chlorine
  • Viral infection

What symptoms can occur with pink eye?

  • Crusty eyelids and eyelashes
  • Eye discharge that may be clear, yellow, white or green
  • Gritty feeling in the eye
  • Increase in the volume of watery tears
  • Itchiness, irritation or a burning sensation
  • Redness of the whites of the eye or inside of the eyelids
  • When contact lenses are in, your eyes feel uncomfortable, and your contacts may not stay in position

How is pink eye treated?

Treatment depends on the cause:

  • Minor cases of bacterial conjunctivitis: These usually clear up on their own. Antibiotic eye medicine is sometimes prescribed to speed up healing.
  • Severe cases of bacterial conjunctivitis: These may require antibiotics.
  • Allergic conjunctivitis: Treatment depends on the allergen that’s identified. Antihistamines or eye drops may be used to help reduce the immune system’s reaction. Over-the-counter artificial tears and cold compresses can help ease symptoms.
  • Viral conjunctivitis: Cold compresses and artificial tears can help ease symptoms.

Note: If have pink eye and are wearing contact lenses, throw them away. Do not use contact lenses until your infection is completely cleared up.

Can the spread of pink eye be prevented?

When caused by a virus or bacteria, pink eye is highly infectious and can spread rapidly from person to person. To reduce the risk of getting or spreading pink eye:

  • Avoid sharing makeup, contact lenses, lens cases and eyeglasses
  • Avoid touching or rubbing your eyes
  • Wash your hands frequently with soap and warm water

References used as sources for this page

  1. Treating Pink Eye (Conjunctivitis) | CDC. Available at: https://www.cdc.gov/features/conjunctivitis/index.html. (Accessed August 24, 2019)
  2. Suffering From a Stye or Pinkeye? | Riley Children’s Health. Available at: https://www.rileychildrens.org/connections/suffering-from-a-stye-or-pinkeye. (Accessed August 24, 2019)
  3. Conjunctivitis, styes, eyelid infection: The most common eye infections. Available at: https://www.zeiss.ca/vision-care/en/better-vision/health-prevention/conjunctivitis-styes-eyelid-infection-the-most-common-eye-infections.html. (Accessed August 24, 2019)
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