Sunburn eye pain may be caused by physiological factors, corneal epithelial scratches, conjunctivitis and so on. 1. Physiological factors: If the sun is strong, the cornea and conjunctiva are exposed for a long time, there will be photophobia, resulting in rapid evaporation of the patient’s tears, eye dryness and pain, foreign body sensation, resulting in the patient’s eye pain by the sun. 2. Corneal epithelial scratches: sunburn eye pain, may be due to corneal epithelial scratches, if the sand into the eye, friction, will lead to corneal epithelial damage, accompanied by photophobia. 3. Conjunctivitis: most of them are caused by microbial infections and external stimuli, etc. When patients are exposed to ultraviolet light and welding light, they will have symptoms such as photophobia and tearing, and foreign body sensation in the eyes. If the pain is more serious, it is recommended that the patient go to the hospital in time, under the guidance of the doctor, relevant examinations, according to the specific results of the examination, to take targeted treatment.