why does my eye hurt when i blink

Eye pain when blinking can be caused by several factors including conjunctivitis (pink eye), blepharitis (inflammation near eyelashes), dry eye disease, a foreign object or debris in the eye, styes (infection of eyelid glands), cluster headaches, and optic neuritis (inflammation of the optic nerve). Other causes can be corneal abrasions or injury, allergies, or sinusitis. Dry eyes are common due to inadequate tear production, causing irritation on blinking. Infections such as conjunctivitis or styes also cause redness, swelling, and painful blinking. If the pain persists or is severe, it is important to seek evaluation by an eye care professional to prevent complications.