Bacterial keratitis will have relatively heavier reaction symptoms, such as redness, pain, tearing, photophobia and other symptoms will be relatively strong reaction, if not through timely drug treatment, the disease will progress more rapidly. Viral keratitis is due to the virus latent in the nerve, will cause damage to the nerve epithelium, but the cornea’s sensitivity will be reduced, the patient’s self-awareness of the symptoms are relatively mild, there may be a delay in the early stage of the disease. Secondly, viral keratitis has an important characteristic, that is, it is easy to recur. When the body’s resistance drops, such as when there is a cold, fever, immunity, or during a woman’s menstrual period, keratitis is prone to recurring attacks. However, it is not possible to diagnose the condition on your own based on such symptoms alone. It is important to go to a specialized hospital and be guided by a relevant person to avoid delaying the condition.