Songs are huge triggers for me.

When I am stressed there are certain songs that will induce intense feelings that will allow me to cry uncontrollably and let out all the emotions that I have bottled up, and work to help me
There are other songs that will instantly transport me back to younger years, for instance when my sons were growing up after the divorce, which will trigger such bad thoughts that I have to instantly turn them off otherwise they will overcome me.
There is for me some feel good music which I can happily bop around to, but overall I have to be very careful what I listen to. For me, they are as much triggers are photographs