Drama queen is a person (especially a woman) who acts as though things are much worse than they really are. 

喜欢小题大做的人（特别是女性）常表现得似乎事情比实际上糟糕很多。

Drama queen is an overly dramatic person. They can turn something unimportant into a major deal. They'll blow things way out of proportion whenever the chance is given. 

他们的表现过度戏剧化。他们能把无足轻重的小事闹成大事。他们一有机会就把事态扩大化。