What is the origin of idiom walk on eggs?

The idiom "walk on eggshells" actually comes from the phrase "tread on eggshells". This phrase originally described the delicate and careful way one would have to walk to avoid breaking eggshells.

The idiom is thought to have originated in the 18th century, but its exact origins are unknown. However, the idea of being careful and cautious in the presence of someone or something fragile and easily upset resonates across cultures and languages.

The metaphor effectively conveys the feeling of being constantly on edge, afraid of making a mistake or causing offense.