Red eye is the common name for acute infectious conjunctivitis, an infectious eye disease caused by bacteria or viruses. It includes acute catarrhal conjunctivitis, epidemic hemorrhagic conjunctivitis, etc. Its clinical characteristics are rapid onset, strong contagious, heavy irritation symptoms, the lid conjunctiva is congested or hemorrhagic, showing a red as the main clinical manifestation, so called “red eye”. It is a common ophthalmic disease that occurs in the summer and fall and is often associated with a history of red-eye contact and can be rapidly transmitted and cause widespread epidemics. Red eye clinically develops in both eyes simultaneously or sequentially. Depending on the infecting agent, the duration of the disease and individual differences in resistance, there can be clinical symptoms of different severity. In mild cases, conjunctival congestion, a small amount of purulent or aqueous discharge from the conjunctival sac, itching and foreign body sensation; in severe cases, conjunctival congestion, or subconjunctival hemorrhage, eyelid swelling, large amount of purulent or aqueous discharge, or even corneal epithelial exfoliation, and shyness and lacrimation, burning pain, vision loss, etc., and can be accompanied by swollen lymph nodes in front of the ear, fever and headache and other systemic symptoms. Mild patients can be cured within a week, but severe patients need 1 to 2 weeks, or even more than 2 weeks of treatment to be cured. The sources of red-eye infection vary, mostly through handkerchiefs, towels, hands, water, etc. as the medium, and spread through the affected eye → hand → object → hand → healthy eye or the affected eye → water → healthy eye. It is most likely to spread in collective units, public places and homes where hygiene is not practiced, especially in summer. Swimming pools are the main route of transmission. Red eye generally has a good prognosis, but is extremely contagious and often causes widespread epidemics, so prevention is very important. The principle of prevention is to control the source of infection and cut off the route of infection. Once the patient is found, in addition to active treatment, individuals, families and collective units should be closely isolated. The disease is transmitted by contact, so the patient’s towels, handkerchiefs, washbasins, toys, cultural items and other everyday items should be disinfected, prohibit patients to public baths, swimming places, strengthen the sanitary management of public places, healthy people should pay attention to personal hygiene, do not rub their eyes with their hands, wash their hands frequently, kindergartens, schools, troops and other collective units, do not use the collective eye spotting method of prevention, because cross-infection can cause Cross-infection can cause an epidemic. Medical staff should be cleaned and disinfected for contact with patients and examination equipment to avoid spreading the infection. Red-eye epidemic period can be used chrysanthemum, summer grass, mulberry leaves, two flowers, such as decoction of tea to prevent the. Treatment of red eye, according to the different pathogens of infection using different drugs. For bacterial infections, 10% zebra eye drops, 0.25% chloramphenicol eye drops, 0.5% gentamicin eye drops are often used to spot or rinse the affected eye, and antimicrobial eye ointment is applied before bedtime. For viral infections, acyclic guanosine eye drops and hydroxybenzazole eye drops are commonly used for eye spotting treatment, which is more effective. Chinese medicine calls red eye as Tian Xing red eye, treatment through the identification of the type of treatment. This disease is mostly the first sense of the calendar gas type, commonly used to drive the wind and heat dissipation drink plus or minus treatment: if the lung and stomach heat type, commonly used diarrhea lung drink plus or minus treatment. Also can be used fresh dandelion 120 grams (or 60 grams of dried products) water decoction 300 ml filtered, 150 ml orally, the remaining 150 ml rinse the affected eye in several times, this method is simple and inexpensive, is a proven method of treatment of red eye.