The first step in conjunctivitis is to identify the cause of the disease and what is causing the conjunctivitis. The etiology of conjunctivitis can be divided into two categories, infectious and non-infectious, depending on its different nature. 1. Infectious: inflammation of the conjunctiva due to infection by pathogenic microorganisms. Non-infectious: Allergic inflammation caused by local or systemic allergic reactions is the most common. External physical and chemical factors such as light and various chemicals can also be causative factors. Conjunctivitis in children is also mostly caused by these two etiologies. In case of infectious conjunctivitis: treat with the following methods: (1) Flushing the conjunctival sac which is mainly for cleaning, do not cover the affected eye. (2) Topical antibacterial medication or antiviral eye drops or ointment. Depending on the pathogenic diagnosis, the appropriate therapeutic drugs are selected. (3) Systemic treatment For severe conjunctivitis, a combination of systemic medications is required, but care should be taken to avoid medications that are contraindicated in children, such as gentamicin, ofloxacin, etc. For non-infectious conjunctivitis, such as allergic conjunctivitis, do not abuse antibiotics, but use anti-allergy eye drops, such as sodium cromoglycate eye solution. Children are more likely to get conjunctivitis for two reasons: firstly, the immaturity of the eye surface tissue and poor immune barrier make the conjunctiva susceptible to infection by bacteria and other pathogenic microorganisms; secondly, children have poor control ability and do not pay attention to hygiene, and rubbing their eyes with dirty hands can easily bring in germs and cause infection. Therefore, the key to preventing conjunctivitis in children is to pay attention to hand hygiene. The difficulty in the treatment of conjunctivitis in children lies in the poor compliance with medication and the lack of cooperation in ordering eye medication. For this problem, parents may need to master some small skills, such as ordering eye medication in the inner corner of the eye and waiting for the child to open his eyes to flow naturally into the eye.