Red eye is clinically known as acute conjunctivitis, and the patient’s eye secretions are highly contagious and transmissible during both the treatment and recovery periods. If treated promptly, it usually heals within 3 weeks and is not contagious after healing. Acute conjunctivitis is a common ophthalmic disease that is caused by bacterial or viral infection of the conjunctiva, mainly in both eyes or in one eye. If the infection is severe or is not treated promptly, the course of the disease may be prolonged and may last 3-4 weeks or longer. During the treatment period, the towel, basin, swimming pool water, toys that the patient has touched may be transmitted, so attention should be paid to isolation, others try not to touch the patient’s eye secretions and personal hygiene items, do not rub your eyes with your hands, do wash your hands regularly. In addition, if you have a patient with pink eye at home, you should also pay attention to the strict separation of toiletries and remind the patient to use eye drops as prescribed by the doctor. You should also wash your hands before and after touching the patient and before and after using eye drops.