Children’s blinking and mouth twitching may be caused by facial neuritis, eyelid entropion and inverted eyelashes, and Tourette’s syndrome. 1. Facial neuritis: As children’s nervous system is not yet well developed, their neuromodulation function is weak. When the facial nerve is invaded or infected by a virus, it may affect the child’s facial expression, resulting in blinking and twitching of the mouth. 2. Eyelid inversion and inverted eyelashes: Due to congenital eyelid inversion, the eyelashes are inverted on the surface of the eyeballs, which irritates the eyeballs and may cause stinging pain and foreign body sensation. So children blink their eyes while their mouth twitches. 3. Tourette’s syndrome: Tourette’s syndrome occurs in children due to genetic factors, perinatal injuries, psychological factors and so on. Tourette’s syndrome is characterized by purposeless, involuntary repetitive muscle twitching, such as eye blinking, mouth twitching, grinning, making faces, etc., with eye and facial twitching as the first symptom. If a child has frequent eye blinking and mouth twitching, he or she should go to the hospital in time to check the cause of the disease so as not to delay the condition.