Eye pain when blinking may be caused by foreign body in the eye, inverted eyelashes, eyelid inflammation and other reasons. 1. Foreign body in the eye: when there is a foreign body in the conjunctiva, such as iron filings or gravel, blinking the eye can cause friction, which can lead to the symptoms of pain and foreign body sensation in the eye. 2. Inverted eyelashes: when the eyelashes are inverted in the eye, blinking the eye can cause it to be scraped back and forth by the eyelashes, which will lead to more obvious pain in the eye. 3. Granuloma: When the hair follicles of the eyelashes become septic and infected, it can lead to the formation of a pustule that contains an abscess, which is known as a granuloma. As the abscess has tension, it can compress the skin nerves, which leads to more obvious pain in the eye, and blinking will lead to increased pain symptoms. When your eyes hurt when you blink, you should pay attention to eye rest and hygiene, and avoid rubbing your eyes with your hands, so as to avoid infection and aggravation of the symptoms. If the symptoms are serious, it is recommended to go to the ophthalmology department of the hospital for examination and treatment in order to avoid delaying the condition.