The onset of acute conjunctivitis is rapid, with a series of acute conjunctivitis manifestations such as redness, swelling of the eyelids, foreign body sensation, burning sensation, increased discharge, photophobia and tearing, and simultaneous or sequential onset in both eyes, which is known as “pink eye”. “Red eye” mainly occurs in the summer and autumn, the hot summer is the “red eye” concentrated season, but there can be cases of dissemination throughout the year. So how to prevent and control “red eyes”? First of all, according to the different causes of “red eyes”, we generally divide them into bacterial and viral conjunctivitis. The main causative agents of acute bacterial conjunctivitis are S. pneumoniae, Staphylococcus and Haemophilus epidermidis. It is characterized by redness and swelling of the eyes, as well as a large amount of mucopurulent discharge, which may form yellow crusts on the eyelashes after drying, causing “difficulty in opening the eyes” when waking up in the morning, and in severe cases, keratitis, but usually without swollen lymph nodes in front of the ear. The disease usually develops in both eyes simultaneously or 1-2 days apart, peaks in 3-4 days, and heals in 10-14 days. Treatment is mainly based on antimicrobial eye drops and ointments, such as ofloxacin or levofloxacin drops and ointment. Among viral conjunctivitis, the most common are epidemic keratoconjunctivitis caused by adenovirus and epidemic hemorrhagic conjunctivitis caused by enterovirus type 70. Both of these viral conjunctivitis have had pandemics in our country and in many countries around the world. Among them, epidemic hemorrhagic conjunctivitis is also a legal infectious disease in China. In addition to redness and swelling of the eyes, most of the discharge is watery and is accompanied by enlarged lymph nodes in front of the ear. When the cornea is invaded, infiltrative whitening of the cornea may occur, resulting in a significant loss of vision. Epidemic hemorrhagic conjunctivitis is usually accompanied by fever, malaise, sore throat, and other symptoms of viral upper respiratory tract infection. Treatment is mainly based on antiviral eye solutions such as virazole or ribavirin eye solution. The common feature of these types of “red eyes” is that they are highly contagious, and sometimes one person with the disease can cause the whole family and colleagues to be infected with the disease within a few days. They are mainly transmitted through the affected eye – hand – healthy eye and the affected eye – hand or object – healthy eye, therefore, the main prevention of “red eye” is to control the source of infection, cut off the transmission route. Specific to do the following: 1, early detection, strict isolation, and active treatment of patients; 2, strengthen the sanitary management of public places, strictly prohibit patients to public bathrooms and swimming places; 3, try to avoid bathrooms and swimming places with poor sanitation; 4, the patient’s basin, towels and other utensils should be strictly disinfected, others should avoid using the patient’s computer keyboard; 5, pay attention to personal hygiene, do not use Avoid medical transmission, medical staff should wash their hands and disinfect before and after examining each patient, and various examination instruments should also be strictly cleaned and disinfected; 7, avoid cross-infection when sharing eye drops in families and collective units; 8, if you suspect that you are suffering from “red eyes”, you should Promptly go to the hospital, according to the doctor’s diagnosis and the type of “red eyes”, the reasonable choice of eye drops. Do not just buy some eye drops and delay treatment and cause infection in others.