Conjunctivitis, commonly known as pink eye, is an inflammation of the conjunctiva, the thin membrane that covers the white part of the eye and the inner eyelids. This condition can cause redness, itching, and discharge from the eye. It can be caused by various factors, including bacterial or viral infections, allergies, or irritants like smoke or dust. Treatment for conjunctivitis depends on the cause. For bacterial conjunctivitis, antibiotics may be prescribed, while viral conjunctivitis usually resolves on its own. Allergic conjunctivitis can be managed with antihistamines. Keeping the eyes clean and avoiding contact with irritants can help prevent this common eye condition.