How is conjunctivitis caused?

Written by Peng Xi Feng

Ophthalmology

Updated on March 14, 2025

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Conjunctivitis is one of the most common diseases in ophthalmology. The causes can be divided into microbial and non-microbial categories, and based on different sources, they can be categorized as exogenous or endogenous. It may also be caused by the spread of inflammation from adjacent tissues, with the most common cause being microbial infections. The pathogens can be bacteria or chlamydia, with occasional fungal, Rickettsia, and parasitic infections.

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Written by Peng Xi Feng

Ophthalmology

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Does conjunctivitis require infusion?

Generally, conjunctivitis does not require intravenous treatment. Treatment primarily focuses on targeting the cause and applying local medications, with systemic medication used when necessary. During the acute phase, it is crucial to avoid bandaging the affected eye. The most basic method of administering medication for conjunctivitis is through eye drops, along with the application of eye ointment before sleep. When there is substantial secretion in the conjunctival sac, it needs to be flushed. In severe cases of conjunctivitis, such as gonococcal conjunctivitis, systemic antibiotics are required in addition to local medications.

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Written by Tao Yuan

Ophthalmology

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Can acute conjunctivitis cause facial swelling?

Acute conjunctivitis can possibly cause swelling of the eyelids and the face. Acute conjunctivitis is a common ophthalmic disease, usually caused by neglecting eye hygiene. For example, rubbing your eyes with dirty hands, washing your face with unclean water, and wiping your eyes with contaminated towels, tissues, or wet wipes can transfer viruses, bacteria, and other pathogens from the environment into the eyes, thereby causing infection and conjunctivitis. Inflammatory stimulation can cause reactive swelling of the skin adjacent to the eye. Conjunctivitis needs timely treatment with anti-infective eye drops to eliminate symptoms. For instance, bacterial infections can be treated with eye drops such as Levofloxacin Hydrochloride and Fusidic Acid, while viral infections can be treated with Ganciclovir and Acyclovir eye drops. (Please follow medical advice when using medications.)

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Written by Peng Xi Feng

Ophthalmology

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Is conjunctivitis contagious?

Hyperacute bacterial conjunctivitis has a short incubation period and progresses rapidly. It can be transmitted through genital-eye contact. Acute or subacute bacterial conjunctivitis, commonly known as pink eye, is highly contagious, prevalent in the spring and autumn, and is generally spread through contact with items used by an infected person. Therefore, it is essential to take preventive measures.

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Written by Peng Xi Feng

Ophthalmology

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Can you take a bath with conjunctivitis?

Patients with conjunctivitis can bathe, but should strictly pay attention to personal and collective hygiene, advocate frequent handwashing and face washing, and avoid wiping eyes with hands or sleeves. Do not share a towel with others. Patients in the acute phase need to be isolated to prevent transmission and curb the epidemic. When one eye is infected, precautions should be taken to prevent the other eye from being infected.

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Written by Peng Xi Feng

Ophthalmology

45sec

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Is conjunctivitis prone to recurrence?

Conjunctivitis is a type of localized inflammation, similar to other inflammations. This disease may recur frequently, especially in children, infants, elderly or frail patients, or those with chronic debilitating diseases such as diabetes. Due to weaker bodily resistance, these individuals are more susceptible to repeated bacterial infections. To avoid such situations, it is advised to pay attention to healthy dietary habits, avoid spicy and irritating foods, and appropriately increase physical exercise to enhance resistance, thereby minimizing the chances of disease recurrence.