Conjunctivitis, commonly known as pink eye, can be caused by various factors, including viruses, bacteria, allergens, chemicals, and other diseases. Here are the main causes of conjunctivitis:
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Viral Infection: Conjunctivitis is most often caused by a viral infection, which can be associated with the common cold, upper respiratory tract infection, and, in rarer instances, herpes and sexually transmitted diseases.
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Bacterial Infection: Bacterial conjunctivitis is caused by certain bacteria such as Staphylococcus aureus, Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, Chlamydia trachomatis, and Neisseria gonorrhoeae. It can be spread easily, especially in certain settings, and may cause sore, red eyes with a lot of sticky pus in the eye.
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Allergens: Allergic conjunctivitis is a response to an allergy-causing substance such as pollen, animals, cigarette smoke, pool chlorine, or other environmental factors. It is not contagious and makes the eyes very itchy.
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Chemicals: Facial or eye makeup, air pollution, chlorine in swimming pools, or other toxic chemicals can cause irritation or inflammation in one or both eyes.
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Other Causes: Other causes of conjunctivitis include contact lens wear, foreign bodies in the eye, indoor and outdoor air pollution, fungi, and certain diseases.
Its important to note that most cases of conjunctivitis arent a cause for concern, but its essential to seek medical advice if symptoms are severe or persistent, especially in newborn babies.
