Conjunctivitis is a swelling and irritation of the membrane that covers the white part of the eye and eyelid lining. It is often referred to as “pink eye” due to the pink color of inflamed blood vessels.

Many irritants can cause temporary conjunctivitis. Seasonal or indoor allergens, pollutants in the air, eye makeup, contact lenses, or other kinds of debris may cause irritation and inflammation. It is usually alleviated when debris or allergens are no longer present. Washing the affected eye and keeping it clean often allows enough time to heal, and symptoms should subside.