The main reasons for sudden stinging pain in the eye are as follows: 1. In dry eye, the tear film is unstable and poorly functioning. If the number of transients decreases and the tear film ruptures during prolonged concentration on visual objects, it will cause sudden stinging pain in the eye. It is recommended that local drops of preservative-free artificial tears be used to improve the stability of the tear film and increase the comfort of the eye surface. If dry eye is accompanied by lid gland dysfunction, it is recommended to go to a regular ophthalmology office for lid gland massage, then lid margin application of tobramycin dexamethasone eye ointment, and usually to insist on hot compresses, using a warm towel at 42°C on the eyelids, 3 times/day for about 10 minutes. 2, prolonged late nights and lack of sleep may cause sudden stinging discomfort in the eyes the next day, it is recommended to develop good habits and ensure sufficient sleep, and avoid staying up late. 3, long time close eye use, such as reading cell phones, computers, etc. will cause eye fatigue, stinging discomfort, it is recommended to use the eyes at close range for 40 minutes, far away for about 10 minutes, and often do eye exercises to improve eye circulation and relieve eye fatigue.