"... they put creatures in our ears!" (Chekov's later explanation of the torture they'd endured). I thought of that clip too, Nate.
There was also a Night Gallery TV episode about an earwig being used in an attempted murder in some jungle, but it was botched and went into the would-be murderer rather than his intended victim. (Rod Serling's Night Gallery was a short-lived series that came some years after The Twilight Zone had ended production). It was a freaky / frightening episode, where the kicker at the end was about "females lay eggs" (OK, mgg, I'm guessing you saw that one too maybe?). Scared the heck out of me when I was a little kid and saw it.
I too had an insect get into my ear, just a few years ago. Mine was some kind of biting beetle. I went to a walk-in clinic where a nice doctor like Frank or Ed took it out with forceps. Bloody and swollen, but it healed. ("Well it got better, you know").
Hope your niece's ear heals soon.
Mike central NY state, zone 5