What Causes Pink Eye?

By becky

Article Sources

Article Sources

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Pink eye, or conjunctivitis, results from inflammation of the conjunctiva of the eye, which is a thin, clear membrane that covers the sclera (the white part of the eye). The pink appearance of the eye occurs as the blood vessels expand in response to the irritation.

There are several different common causes of pink eye, which can be categorized into viral, bacterial, and allergic conjunctivitis³Pink eye (conjunctivitis). (2020, June 16). Retrieved November 18, 2020, from https://www.mayoclinic.org/diseases-conditions/pink-eye/symptoms-causes/syc-20376355. The source of the condition determines what symptoms the individual experiences, how contagious it is, and what treatment is required.

1. Viruses

Pink eye can sometimes be a symptom of other viruses, which can be spread by direct contact from an infected surface, such as a contaminated hand touching the eye. Symptoms can last a few days to a couple of weeks and often go away on their own without medical intervention.

There are several different types of viruses that can cause pink eye, such as the common cold. Adenovirus is the most common culprit. COVID-19 can also cause eye inflammation in 1% to 3% of people. Herpes simplex virus and varicella-zoster virus are others.