何なにかあったの

expression

what's wrong?; did something happen?; what's up?

Casual, often concerned or curious question when someone seems upset, distracted, or different from usual. The の ending adds an explanatory or soft, feminine tone.

• 元げん気きないね。何なにかあったの？

  You seem down. Did something happen?

• 急きゅうに黙だまっちゃって、何なにかあったの？

  You suddenly went quiet. What's wrong?