Discover insights about conjunctivitis – its symptoms, types, and treatments. Learn how to manage this eye condition effectively through expert advice. Medfin Blog's informative guide awaits. Conjunctivitis (pink eye) is an infection or swelling that typically gives your eye a red or pink color. Learn about the symptoms, causes, and treatment. Conjunctivitis — often called pink eye — is inflammation of the conjunctiva in one or both eyes, caused by an eye infection or allergies. Pink eye can affect adults or children. If you have pink eye, your eyes will be red and swollen (inflamed) and may have a sticky discharge. Pink eye, also called conjunctivitis, is an infection of the eye's conjunctiva usually caused by a bacteria or virus that results in red, itchy, painful eyes.