When you keep hearing about something, you have a fairly simple choice, listen or ignore it. I've chosen to listen to what I've been hearing about triggers lately because I've been hearing about them everywhere! And what I've heard makes a lot of sense as well as being really helpful to me right now.
Triggers are one way of knowing what needs to be digested. When something is stuck in our life, it hasn't been digested, we're metaphorically choking on it, and until it's assimilated, it will continue to cause us pain. However triggers are not the source of our pain, they only point us to our pain. A trigger can be anything, a smell, a noise, a look, a touch and if we're really serious about being at ease with ourselves, we'll take our triggers very very seriously and tap on them.