Itis refers to an inflammation like bronchitis or tonsillitis.

它指的是一种如支气管炎或扁桃体炎的炎。

But...I get tonsillitis. It could get infected.

但是 我了扁桃体炎 这有可能会感染的。

One day, he had tonsillitis because he ate too many tonics, such as tomato paste.

一了扁桃腺炎因为吃了太多的滋补药，比如蕃茄酱。