Keratitis is a common ophthalmic disease, occurring as an infection in the black eyeball area of the eye. Recurrent viral keratitis is a normal phenomenon, as the virus can remain dormant within the corneal nerve fibers even after recovery. Triggers such as fatigue, colds, or weakened immunity can cause the virus to replicate again, leading to a recurrence of keratitis. Symptoms include eye congestion, redness, stinging, foreign body sensation, photophobia, tearing, and decreased vision. Doctors use a slit-lamp microscope to observe the cornea, where dendritic or map-like lesions can be seen. Treatment involves using antiviral eye drops to alleviate symptoms, such as acyclovir eye drops, ganciclovir eye drops, and interferon eye drops. (Please use medications under the guidance of a doctor.)