make a mountain out of a molehill
小题大做，把小事看得很严重
口语·表达夸大小事
英文释义
exaggerating or making a big deal out of something small or unimportant
例句
It's just a small scratch—don't make a mountain out of a molehill.
典故来源
源自16世纪谚语，将鼹鼠丘比喻为大山，讽刺夸大其词。