Conjunctivitis or dacryocystitis is the most common infectious disease of the eye, and is caused by a bacterial infection that results in a pus-like discharge. Conjunctivitis is the most common infectious disease of the eye, which occurs in children and adolescents. It is generally caused by bad hygiene habits such as rubbing the eyes with dirty hands, which leads to infection of the conjunctival tissues of the eye, and is also accompanied by symptoms such as congestion of the eye and conjunctival edema, etc. It can be treated with antibiotic eye drops, such as Ofloxacin eye drops, Moxifloxacin eye drops and so on. Dacryocystitis is generally due to the blockage of the tear duct after the stagnation of the tear fluid in the lacrimal sac breeding bacteria breeding caused by, but also accompanied by persistent tearing of the eye and other symptoms, need to use antibiotics eye drops based on the treatment, through the surgical dredging of the tear duct to be able to cure. The patient should go to the ophthalmology department of the hospital in time, and the doctor will diagnose the specific cause through detailed examination, and then can take targeted treatment to eliminate the symptoms.