"What is pink eye" Pink eye, also known as conjunctivitis, is an inflammation of the conjunctiva—the clear membrane covering the white part of the eye and the inner eyelid. It can be caused by various factors, including bacterial or viral infections, allergies, or irritants. Symptoms of pink eye may include redness, itching, a gritty sensation, excessive tearing, and discharge. Treatment depends on the cause and may include antibiotic eye drops, antihistamines, or artificial tears. It's important to practice good hygiene, avoid touching the eyes, and seek medical advice for proper diagnosis and treatment.