When you don't blink then close your eyes why does it hurt?

When you don't blink for an extended period, your eyes can become dry and irritated due to the lack of moisture. Closing your eyes after this can create a sensation of discomfort as the eyelids rub against the dry surface of the eyes. Additionally, the sudden change in pressure or light exposure can trigger discomfort. This is why it's important to blink regularly to keep the eyes lubricated and comfortable.