Children always blinking, consider that it may be related to habits, allergies, overuse of the eyes, foreign body stimulation and other reasons. 1. Habit: Many children blink their eyes habitually, simply because they find blinking interesting, and it is difficult to correct the habit gradually. 2. Allergy: in spring, pollen, willow, etc. into the eyes will induce eye allergies, may also lead to small children always blinking. 3. Excessive use of the eyes: children study for a long time, watching TV will lead to excessive use of the eyes, eye fatigue, will lead to children blinking. 4. Foreign body stimulation: dust, bugs and foreign bodies into the eyes will cause eye discomfort, may also lead to children always blinking. There may be other clinical diseases, such as Tourette’s syndrome, etc. If a child blinks all the time, it is recommended to take the child to the ophthalmology department of the hospital as soon as possible in order to clarify the cause of the disease.