make a mountain out of a molehill

From Wiktionary

Pronunciation[change]

Expression[change]

Expression
make a mountain out of a molehill

  1. (transitive) (idiomatic) If you make a mountain out of a molehill, you exaggerate the importance of something trivial.
    If you’re stuck in traffic, try not to make a mountain out of a molehill worrying about it too much. It could be much worse.