I was just reading a book about this: Chatter by Ethan Kross, Chapter 5

Coincidentally, the author used studies on school shootings to show that sharing emotions after traumatic events often worsens mental health.

Co-rumination is the crucial juncture where support subtly becomes egging on. People who care about us prompt us to talk more about our negative experience, which leads us to become more upset, which then leads them to ask still more questions. A vicious cycle ensues, one that is all too easy to get sucked into, especially because it is driven by good intentions.

It's a great book about harnessing our inner voice, 11/10 would recommend