Contrary to popular belief, aegyo sal is not eye bag.
Aegyo sal is a small piece of fatty tissue that sits right under the lower eyelids. We often see aegyo sal in younger children and they seem to disappear when they reach adulthood. Many people like the appearance of aegyo sal because it gives them a youthful appearance.
On the other hand, eye bags are formed because the muscles that support the eyelids weaken and the fatty tissues under the eyes are displaced and move into the lower eyelids. The formation of eye bags often make people look tired and unattractive.