Pink eye, also known as conjunctivitis, is an inflammation of the conjunctiva that causes redness, swelling, and irritation of the eyes. It is often caused by infections or allergies and is highly contagious, especially among children. Proper hygiene, such as avoiding rubbing the eyes and washing hands, towels, and bedclothes regularly, can help prevent and manage pink eye. Seeing a doctor is important to identify the cause and receive the appropriate treatment, such as antibiotics, painkillers, or antihistamines. With rest and treatment, pink eye will usually clear up within a week.