Conjunctivitis is a general term for a group of diseases that can be caused by a number of factors, divided into two main categories: first, infectious factors, including bacteria, viruses, fungi, etc.; and second, non-infectious factors, including immune factors, allergic reactions or chemical burns. Treatment options for conjunctivitis caused by different etiologies are different, so don’t use drugs blindly. The first step is to go to the hospital for a detailed examination to clarify the condition before choosing the correct medication. Bacterial conjunctivitis usually requires antibiotics, such as levofloxacin hydrochloride eye drops; viral conjunctivitis requires antiviral medications, such as ribavirin eye drops; fungal conjunctivitis is relatively rare and can be treated with antifungal medications, such as fluconazole eye drops; conjunctivitis caused by immune factors or allergic reactions can be treated with glucocorticoid eye drops or antihistamines. For conjunctivitis caused by immune factors or allergic reactions, you can choose glucocorticoid drops or antihistamines, such as azelastine hydrochloride eye drops or flomiron eye drops.