Boys always squeeze their eyes may be caused by conjunctivitis, tics, inverted eyelashes and other diseases. 1. Conjunctivitis: Conjunctivitis is an inflammatory disease that occurs in the conjunctiva, mostly caused by microbial infections, external stimuli, the patient may manifest photophobia, tearing, foreign body sensation in the eye and other uncomfortable symptoms, which can lead to children always squeeze their eyes. 2. Tourette’s syndrome: Tourette’s syndrome is a kind of motor or vocal muscle twitching disease that occurs in childhood, and the clinical symptoms mainly include blinking, rolling eyes, shrugging nose, shrugging shoulders, shaking head, making faces and so on. 3. Inverted eyelashes: Inverted eyelashes children because of the abnormal growth of eyelashes, irritation of the eye surface tissue, the patient may appear frequent blinking, photophobia, tearing, foreign body sensation and other uncomfortable symptoms. It is recommended that children with frequent blinking and other discomforts consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.