What Is Conjunctivitis? A Complete Guide

Conjunctivitis, commonly known as pink eye, is a condition that causes inflammation of the conjunctiva, the thin layer of tissue that covers the white part of the eye and lines the inside of the eyelid. This article will give you all the details on what is conjunctivitis (ตา ติด เชื้อ, which is the term in Thai). So keep on reading to the end.


The symptoms of conjunctivitis can vary depending on the cause of the condition. Common symptoms include redness of the eye, itching or burning sensations, excessive tearing or discharge, swollen eyelids, and sensitivity to light. Sometimes, the eyelids may become crusted or stuck together in case of bacterial infection.


There are three main types of conjunctivitis: viral, bacterial, and allergic. Viral conjunctivitis is caused by a virus, such as the common cold or the flu, and is highly contagious. Bacterial conjunctivitis is caused by a bacterial infection and is also highly contagious. Allergic conjunctivitis is caused by an allergic reaction to substances such as pollen, dust, or pet dander, and is not contagious.

Another section in understanding what is conjunctivitis is the other types. In addition to these three main types of conjunctivitis, other less common types can be caused by underlying medical conditions such as autoimmune disorders, sexually transmitted infections, or exposure to certain chemicals or drugs.

For viral conjunctivitis, there is no specific treatment, and the symptoms will usually resolve on their own within one to two weeks. However, in some cases, antiviral medication helps speed up the healing process. Bacterial conjunctivitis is treated with antibiotics, either in the form of eye drops or ointments. Allergic conjunctivitis is typically treated with antihistamines or other allergy medications to help alleviate symptoms.


To prevent spread, it is important to practice good hygiene. This includes washing your hands frequently, avoiding touching your eyes, and avoiding close contact with others who have conjunctivitis. It is also important to avoid sharing towels, pillows, or other personal items with someone who has conjunctivitis. Applying a cool, damp washcloth to the affected eye can help soothe itching and burning sensations.

While conjunctivitis can be uncomfortable and inconvenient, it is typically not a serious condition and can be treated effectively with appropriate care. However, in rare cases, conjunctivitis can cause more serious complications, such as vision loss or damage to the eye, particularly if left untreated.

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