The discharge of conjunctivitis is related to the nature and course of the conjunctivitis. For example, in common bacterial infectious conjunctivitis, such as acute bacterial infectious conjunctivitis, the discharge is usually a golden or green discharge, and in chronic bacterial conjunctivitis, the discharge may be a foamy discharge. In viral infections, the discharge is aqueous, and in allergic conjunctivitis, the discharge may be strained. Overall, this ocular discharge is a mixture of inflammatory cells, bacteria, viruses, and tears. Depending on the nature of the discharge, it is possible to determine the cause of the conjunctivitis and to select the appropriate eye drops for symptomatic treatment.