A child’s constant blinking may be related to impingement, conjunctivitis, and Tourette’s syndrome. 1. Inverted eyelashes: Inverted eyelashes children because of the abnormal growth direction of eyelashes, eyelashes stimulate the patient’s ocular surface tissues such as the conjunctiva, cornea, etc., which can cause ocular discomfort, and the child may appear to blink incessantly, be afraid of the light, tears and other uncomfortable symptoms. 2. Conjunctivitis: due to the child rubbing the eyes or some eye foreign body stimulation and other factors, resulting in children with conjunctiva, under the stimulation of inflammation, the child may appear to blink constantly, may also be accompanied by photophobia, conjunctival congestion and other symptoms of discomfort. 3. Tourette Syndrome: Tourette Syndrome may be related to genetic factors, brain development and mental factors, which may cause involuntary localized muscle twitching, and children may have symptoms such as incessant blinking and twitching of the corners of the mouth. It is recommended to consult a doctor to evaluate the condition of the child who keeps blinking his/her eyes and has other discomforts, and to follow the doctor’s instructions for treatment.