Is pink eye contagious?
Nov 19, 2025
Source: Cainiu Health
Dr. Liu Wenmin
Introduction
If "pink eye" is caused by pathogens such as bacteria or viruses—for example, acute conjunctivitis or viral keratitis—the eye secretions of affected individuals contain infectious agents that can spread through direct contact (such as sharing towels or touching others after rubbing the eyes). Healthy individuals may become infected upon contact, and transmission is particularly likely in crowded settings. These types of "pink eye" are highly contagious.
Generally, "sore eyes" refers to discomfort or illness affecting the eyes. Some types of "sore eyes" (such as infectious eye diseases) are contagious, while non-infectious forms are not—the transmissibility depends on the specific underlying cause. If in doubt, it is advisable to consult a healthcare professional promptly. Detailed explanations are as follows:
If "sore eyes" is caused by pathogens such as bacteria or viruses—for example, acute conjunctivitis or viral keratitis—eye secretions from affected individuals may contain infectious agents. These can spread through direct contact (e.g., sharing towels or touching others after rubbing the eyes). Healthy individuals may become infected upon exposure, and transmission is particularly likely in crowded environments. Such types of "sore eyes" are highly contagious.
If the condition is non-infectious—such as dry eye syndrome, allergic conjunctivitis, or eye discomfort due to visual fatigue—it typically results from abnormal tear production, allergic reactions, or excessive eye strain. Since no pathogens are involved, these conditions cannot be transmitted to others through contact or any other means. They affect only the individual patient, and there is no risk of contagion.
When symptoms of "sore eyes" occur, it is important to seek medical evaluation to determine the exact cause. If an infectious eye disease is diagnosed, proper isolation measures should be taken (e.g., using separate personal hygiene items). Avoid rubbing the eyes with hands, and wash hands thoroughly after any contact with the eyes. When others show similar symptoms, avoid sharing personal items to reduce the risk of transmission, and follow medical advice for appropriate treatment.
