The conjunctiva is an important part of the eye and is a membranous tissue, commonly referred to as a layer of mucosal tissue that covers the inner surface of the eyeball and eyelid. Therefore, the conjunctiva can be divided into the bulbar conjunctiva, the lid conjunctiva and the vaulted conjunctiva, between which the conjunctival sac is formed. The role of the conjunctiva for the eye is very important: first, it can maintain the integrity of the eye. Second, it can act as a self-purifying agent, and if there is local inflammation, the conjunctiva can repair itself. Any cause of conjunctival inflammation, such as viruses, bacteria, fungi, allergic reactions, abnormal immune mechanisms, physical injuries, and chemical burns, may cause conjunctival damage. After these conditions occur, it is important to go to the hospital for early examination and choose the right treatment according to the condition.