Why do eyelids sag?
Because we blink tens of thousands of times per day, the eyelid skin is thinner than other skin on your face. It contains fewer moisture glans and is prone to stretching and drooping. Rubbing your eyes, squinting, and sun exposure contributes to the situation.
Also, aging brings adjacent fat bulges and since fat retains water, you undereye bags appear. Multiple factors, including heredity, are responsible for these cases.