Learn what "why are you suddenly upset" means, when people say it, and how to use it naturally in English.

It asks for the reason behind someone's sudden bad mood or emotional reaction.
From Do Not Deceive Me, Episode 27
The speaker asks why someone has suddenly become upset.
Use this when checking in on someone who seems to have changed mood. It can sound caring, but in an argument it may feel like pressure to explain themselves.
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