The sudden appearance of soreness and tearing in the eye is usually caused by the following reasons: 1. due to foreign bodies in the eye, such as corneal foreign bodies or conjunctival foreign bodies, which are usually caused by sand and other foreign bodies entering the eye in the environment where the patient works or lives, which can cause damage to the cornea and conjunctival epithelium by rubbing them, thus causing soreness and tearing in the eye. 2. due to electrophthalmia, which is caused by bright light or ultraviolet light and other irritants that burn the corneal epithelium. The symptoms are usually very intense, with symptoms such as soreness and tearing, as well as photophobia and vision loss. 3, caused by corneal epithelial abrasions, usually due to careless rubbing of the eye with too much force, resulting in exfoliation of the fragile corneal epithelium, will immediately appear the above symptoms, but generally 2-3 days to heal naturally.