Some children blink frequently, and their parents go around and treat them with repeated medications that do not work well. So what are the common causes of blinking in children? 1, refractive error: myopia, hyperopia, astigmatism, eye position and visual fatigue due to abnormal visual function can cause double eye discomfort repeatedly blinking. 2, eyelid disease: entropion impingement, blepharitis, lid gland cysts, blepharitis, conjunctival calculi, conjunctival inflammation. 3. Corneal disease: keratitis, corneal injury. 4, allergic diseases: allergic conjunctivitis causes itchy eyes and blinking, mostly accompanied by other allergic diseases of the body, such as asthma, allergic rhinitis and dermatitis. 5, tear film stability abnormalities: dry eyes cause dry eyes and frequent blinking, in addition in the treatment of frequent blinking process repeated use of eye drops can damage the stability of the tear film and aggravate dry eyes. 6, video terminal syndrome: prolonged reading and prolonged exposure to television, computers cause visual fatigue, dry eyes and blinking, mainly dry eyes, itchy eyes, burning foreign body sensation, blurred vision, vision loss, eye distension, orbital pain and other symptoms. 7, dietary habits: long-term picky eating, partiality, vitamin, trace element deficiency. There are often zinc and iron deficiencies, and some have slightly higher blood lead levels. 8.Children’s hyperactivity: A larger percentage of children have frequent blinking as a sign of hyperactivity, which can be accompanied by multiple twitching of the neck, shoulders, upper limbs and other parts. 9, habits and other causes such as psychological implication. Treatment: Treat the cause, change bad habits, correct refractive errors, use appropriate medication, and ask for pediatric consultation if hyperactivity is suspected, in addition, parents should not remind their children too much to avoid psychological suggestion.