Conjunctivitis, commonly known as pinkeye or PINK eye, is an inflammation of the conjunctiva, the thin transparent layer of tissue that lines the inner surface of the eyelid and covers the white part of the eye. It is a very common eye infection, especially in children, and can be caused by a virus, bacteria, allergies, or irritants. Symptoms include redness, itching, burning, and discharge from the eyes. Treatment typically involves antibiotics, anti-inflammatory medications, and lubricating eye drops.