Squeezing the eyes of a three-year-old child may be caused by habitual blinking, congenital inverted eyelashes and tic disorder. 1. Habitual blinking: it is a more common phenomenon among children, who always like to imitate others as a way to attract attention. If this happens for a long time and parents don’t notice it, it will form a habit. 2. Congenital inverted eyelashes: inverted eyelashes are often caused by inward turning of the eyelid due to the pulling of the medial canthus, and the bridge of the nose is not fully developed. Inverted eyelashes stimulate the eyeball, there will be a sense of discomfort, so the child unconsciously squeeze the eyes. 3. Tourette’s syndrome: due to sudden irregular muscle groups repeated and intermittent abnormal contraction, resulting in motor tics, will appear to squeeze the eyes, may also be accompanied by wrinkled nose, shaking the head and other strange movements. Three-year-old child squeezing eyes, it is recommended to seek medical attention in a timely manner, follow the doctor’s instructions for further examination, to clarify the cause, and targeted treatment.