What is “pink eye”? ”Red eye” is the common name for acute or subacute bacterial conjunctivitis, also known as “acute catarrhal conjunctivitis”, which is characterized by red eyes, foreign body sensation, and increased discharge. Clinical manifestations: rapid onset, incubation period of 1 to 3 days, simultaneous onset in both eyes or 1 to 2 days apart. The onset of the disease culminates in 3 to 4 days and gradually decreases later. It often presents with eye discomfort such as eyelid redness, eye redness, eye pain, foreign body sensation, and discharge (the discharge is mostly yellowish-white, purulent and sticky, often sticking to the upper and lower eyelashes, making it difficult to open the eyes in the morning). Vision is generally unaffected. The duration of the disease is usually less than 3 weeks. Treatment: Treatment is based on local medication. When there is a lot of secretion, the conjunctival sac can be flushed with saline or a clean cotton swab can be dipped to remove the secretion before medication is administered (be careful when flushing to avoid damaging the corneal epithelium, and do not flow the flushing solution into the healthy eye to avoid cross-contamination). At present, broad-spectrum aminoglycosides or quinolones (such as tobramycin eye drops and ofloxacin eye drops) and erythromycin eye ointment are often used; the eye can be dotted every 1 to 2 hours during the acute stage. Prevention: The disease is highly contagious and can be transmitted by contact, and can be prevalent in places where people are concentrated (such as kindergartens, schools, factories, barber stores, swimming pools, etc.). Therefore, pay strict attention to personal hygiene, wash your hands regularly, avoid contact with patients’ tears and secretions, wash your hands when you go out and come home at ordinary times, and wash your hands after administering medicine to patients. Patients in the acute stage should be isolated and not share toiletries with others; try not to wipe your eyes with your hands and sleeves to prevent the spread of the disease by bringing the secretions to other places.