Conjunctivitis is swelling and irritation of the membrane that covers the white part of the eye and the eyelid lining — commonly known as pink eye because of inflamed blood vessels.
Causes
Temporary conjunctivitis can result from seasonal or indoor allergens, air pollutants, eye makeup, contact lenses, or debris. Symptoms typically resolve once the irritant is removed and the eye is kept clean.
Infection Conjunctivitis
Infection-based cases are either viral or bacterial:
- Viral: may accompany colds, fevers, sore throats, or flu, causing redness and watery discharge
- Bacterial: often caused by staph or strep bacteria, producing redness and mucus discharge
Both types are highly contagious and spread easily — particularly in schools and daycares. While generally mild, professional evaluation is essential, especially for newborns, to prevent vision complications.
Treatment
Treatment depends on the cause, but all forms of conjunctivitis benefit from professional evaluation. Most cases respond well to antibiotics, eye drops, or ointments.