The Pandora’s box myth explains the arrival of suffering in the human world through Pandora’s opened container.
In the familiar version, Pandora opens a container and releases disease, toil, misery, and other troubles that had previously been absent from human life. Hope remains inside after she closes it. The story functions as an origin myth: it explains why mortal existence includes hardship while preserving a possible source of endurance.
The expression is now also an English idiom for an action that creates many unforeseen problems. It is used in journalism, politics, business, and everyday conversation, far beyond its mythological setting.
Strictly speaking, Hesiod described a pithos, or large jar, rather than a box. The title “Pandora’s box” became standard through later translation and cultural transmission. That distinction is one of the best-known differences between the ancient source and the modern phrase.