Conjunctivitis is a very common disease in ophthalmology caused by a variety of factors. Viral conjunctivitis is a self-limiting disease that can heal spontaneously, but with some individual variation and variable healing time. The common clinical causes of conjunctivitis are mostly infectious factors, such as bacteria, viruses, fungi, mycoplasma, chlamydia, etc. In addition, some ophthalmic surgeries can also cause reactive inflammation of the conjunctiva; allergic factors are also common causes of conjunctivitis, such as conjunctival inflammation caused by allergic factors, and the inflammation usually heals spontaneously after the allergic factors are removed. The ability of conjunctivitis to heal on its own depends on a variety of factors, including the individual’s physical condition, the severity of the lesion, and the cause of the disease. If the cause is known but difficult to remove, the inflammation will not heal on its own, such as conjunctival inflammation caused by allergy to dust mites in the environment, because the allergic factors are more difficult to remove, therefore, this inflammation is more difficult to heal. If the conjunctival inflammation is caused by a systemic disease or other disease, it is also difficult to heal if the primary disease is not well treated.