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Conjunctivitis

Conjunctivitis, also known as pinkeye, is an inflammation of the conjunctiva, the transparent membrane that covers the white part of the eyeball. 

The telltale sign on conjunctivitis is redness in the eyes. However, there are other symptoms such as itchiness and even discharge from the eyes. 

The first cause of conjunctivitis is bacterial or viral infections. Most cases are typically caused by adenovirus, but other viruses such as herpes simplex virus and even COVID-19 can cause conjunctivitis. Both types of infections are very contagious. 


Conjunctivitis can also be caused by allergens. In response to allergens, the body produces an antibody, immunoglobulin E. IgE triggers mast cells in the mucous lining of the eyes and airways to release inflammatory substances. 


Lastly, conjunctivitis can be caused by irritation. This form of conjunctivitis usually clears up on its own within a day.


Sources:

https://www.mayoclinic.org/diseases-conditions/pink-eye/symptoms-causes/syc-20376355

https://www.webmd.com/eye-health/eye-health-conjunctivitis#1

https://www.healthhub.sg/a-z/diseases-and-conditions/25/conjunctivitis

https://www.healthline.com/health/conjunctivitis

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