知ち恵え熱ねつ

noun

unexplained infant fever; teething fever

Historically believed to be linked to intellectual development; now used for unexplained fevers in infants, often around teething age.

• 赤あかちゃんが急きゅうに熱ねつを出だしたけど、知ち恵え熱ねつかもしれない。

  The baby suddenly got a fever, but it might be teething fever.

noun

fever from overthinking

Colloquial, often humorous; refers to a slight fever or feeling unwell after intense mental effort, like studying or working too hard.

• 試し験けん勉べん強きょうで知ち恵え熱ねつが出でそう。

  I think I'm getting a fever from all this exam studying.