Conjunctivitis is a common eye disease that occurs more often in the spring, so we should pay special attention to preventing this disease in the spring. The main manifestations of conjunctivitis in spring are itching and burning sensation in both eyes, more so when it is hot or after rubbing the eyes, and mild photophobia and tearing, with not much discharge. Conjunctival inflammation can be caused by many factors, mostly due to foreign viral, bacterial or chlamydial infections, as well as mechanical, chemical, physical (radioactive, electrical, thermal) and other direct stimulation of the conjunctiva. Microorganisms can be introduced into the conjunctival sac from the air, dust, water or through hands or masks with bacteria. Spring conjunctivitis is clinically classified into lid-conjunctival type, corneal margin type and mixed type according to the site of the lesion. The lid conjunctiva type is characterized by lesions in the lid conjunctiva that do not invade the dome. The corneal margin type corresponds to the corneal margin at the lid fissure or at the upper corneal margin, where one or more yellowish-gray gel-like elevated nodules are seen, and the corresponding bulbar conjunctiva is congested. Both the lid conjunctiva and the corneal limbus are often associated with subtle vascular opacities and superficial keratitis. When both types are present, they are mixed. Most conjunctivitis is infectious or epidemic. Therefore, prevention should be the first priority, and once inflammation occurs, immediate measures should be taken to stop its spread. Treatment of conjunctivitis is mainly based on local medication. When the conjunctival sac is full of secretions, saline, boric acid solution or antibiotic solution should be used to rinse the conjunctival sac several times a day to mechanically remove pathogens on the one hand, and to keep the conjunctival sac clean on the other hand, which also has a bactericidal effect. Do not cover the eye, otherwise the secretions can not spill, accelerate the reproduction of pathogens, resulting in the deterioration of the disease. Topical medication is commonly used for various antibiotics and antiviral eye drops. The medication should be ideal for those who are sensitive to the pathogenic bacteria, and the type of pathogenic bacteria should be inferred from the symptoms and nature of the secretions. For refractory conjunctivitis or severe cases, it is best to perform drug sensitivity tests to screen for the most effective drugs. Compared to systemic medications, eye drops have the advantages of being portable, acting directly on the lesion, and having fewer systemic side effects. After the disease is controlled, the number of eye drops should be gradually reduced until the disease is cured that is, stop using drugs. If there are corneal complications, treat them as keratitis.