Children always blink their eyes, commonly due to visual fatigue, conjunctivitis, eyes into the foreign body, inverted eyelashes and other eye diseases and Tourette’s syndrome. 1. Visual fatigue can easily lead to dry eyes and other discomforts, often through blinking to relieve dryness. 2. Bacterial conjunctivitis caused by bacterial infection of the conjunctiva, or allergic conjunctivitis caused by conjunctival contact with external allergens, will lead to children’s eyes to appear foreign body sensation, itchy eyes and other discomforts, blinking frequently. 3. After the eyes into the foreign body, children will have obvious foreign body sensation, blinking frequently. 4. Inverted eyelashes can cause the eyelashes to rub against the corner of the eyeball and the conjunctival surface, causing a foreign body sensation, which is manifested as frequent blinking. 5. Tourette’s syndrome can be caused by heredity, stress, excitement, or organic lesions in the brain, which may result in frequent blinking. Specific causes need to be examined by a doctor.