Inflammation of the conjunctiva, characterized by a pink eye. The cause is either infectious or allergic, though the term "pink eye" is commonly used for any type of conjunctivitis. Other symptoms include burning, discharge, dryness, itching, light sensitivity, eye pain or discomfort, stickiness, tearing and chemosis. See also: acrodermatitis enteropathica, lupus erythematosus, pediculosis. For more information, please see our conjunctivitis article.