Children with constant eye blinking consider visual fatigue, conjunctivitis, inverted eyelashes, and tics. 1. Visual fatigue: looking at the cell phone or computer for a long time will lead to visual fatigue, and it is easy to have dry eyes and other symptoms, so frequent blinking occurs. 2. Conjunctivitis: Conjunctivitis is an inflammatory disease that occurs in the conjunctival tissues, which may be caused by microbial infections, external stimuli, and allergies, etc. Inflammation will cause dryness of the eyes, itching, pain, and foreign body sensation, etc., and the children will also blink frequently. 3. Inverted eyelashes: Inverted eyelashes are eyelashes that grow backward toward the eyeballs, and the eyelashes can irritate the eyeballs, causing symptoms such as photophobia, tearing, and foreign body sensation, as well as frequent blinking. 4. Tourette’s syndrome: Tourette’s syndrome is common in children and adolescents, which is characterized by recurrent motor tics in several parts of the body, and more commonly blinking. Children’s eyes are always blinking, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.