It is well known that conjunctivitis is a relatively common ocular surface disease and is divided into two main categories, infectious and non-infectious, depending on the etiology: infectious conjunctivitis is mainly caused by bacteria, viruses, Chlamydia trachomatis, etc. It can be transmitted by air, dust, water or contaminated hands and towels, and can also be transmitted by adjacent tissue lesions, such as inflammation of the eyelids and tear ducts. Non-infectious conjunctivitis is caused by mechanical, physical (heat, radiation), and chemical (acid and alkaline) stimulation of substances. Conjunctivitis caused by allergic reactions is also common, such as spring conjunctivitis and drug conjunctivitis. Conjunctival congestion and increased secretion are the basic features common to all types of conjunctivitis. Common self-conscious symptoms include foreign body sensation, burning sensation, itching, photophobia, and tearing, which usually do not affect vision. Because of the lack of specificity of some symptoms of conjunctivitis, many patients with conjunctivitis often choose their own drugs at the beginning of the disease is not targeted, many types of drugs are very mixed, more common is the abuse of antibiotic drops, the result is to increase the pathogenic bacteria resistance, clinical efficacy is reduced, resulting in the disease is not cured or even affect vision. This is why it is important to select targeted medications, namely antibacterial eye medications for bacterial and trachomatous conjunctivitis, antiviral eye medications for viral conjunctivitis, and anti-allergy eye medications for allergic conjunctivitis. When using medication, it is also important to note that the medication itself and the auxiliary ingredients can to some extent affect the normal physiological environment of the eye, destabilize the tear film on the surface of the eye, interfere with the normal metabolism of the corneal epithelium, and inappropriate use of these drugs is likely to aggravate the original condition. Many people in actual life tend to ignore the potential damage of antibiotics on the eye tissue, for example, chloramphenicol long-term application can lead to punctate corneal epithelial erosion and detachment, and there are even literature reports of bone marrow suppression in individual patients after local eye drops. Similarly other antibiotic eye drops can also cause damage to ocular tissues, and because there is no unified evidence-based medical standard of care, the choice of drugs in the treatment of conjunctivitis is confusing and multiple drugs are applied simultaneously, which can cause both damage to the eye and unnecessary waste. Therefore, the correct, standardized and reasonable use of medication is important for the relief and control of conjunctivitis symptoms. In summary, the treatment of conjunctivitis should first confirm the cause of the disease, which is usually determined by symptoms and signs, and for those who are unable to determine this on their own, they should seek medical help and not use drugs blindly.