I believe part of the issue is that it is hard to explain what a "trigger" feels like. A while back I saw a discussion between adults that were asked this question.
"I want a name for that feeling we feel when we get triggered. The one that is unbearable. No, it is not an irritation, and if we ask others to multiply it by a billion times, still, it is not. To call it just a pain, does not quite cut it also. Other people have no idea what it is, never felt it, and that is why it is so hard for them to understand. It just has no name. And I want to name it........"
a few of the responses:
I would caution against "pain," because that confuses misophonia with hyperacusis, and the distinction needs to be clear."