Pink Eye (Conjunctivitis) Pink eye, also called conjunctivitis, is inflammation or irritation of the thin clear tissue that covers the white part of the eye and the inside of the eyelid. It can cause redness, watering, itching, drainage, crusting, burning, or a gritty feeling in the eye. Pink eye can be caused by viruses, bacteria, allergies, irritants, or contact lens problems. Some cases are contagious, while others are not. Common symptoms of pink eye Pink eye symptoms may