((( _mouse )))
It takes time, at least for me it did.
When you're feeling angry or afraid etc, it's hard to stop and think about the why's and what's and the core roots.
But at some later time, if you stop and ask yourself, "What did that sound/touch/smell/sight remind me of that caused me to react that way" you should be able to start identifying triggers.
A trigger is not a symptom, it's what activates your symptoms. (heart palpitations, sweats etc)
Like sirens are a major heart-stopper for me. I never really even knew why, until I got into therapy and connected it, but now I am able to say, "Ok, it's not happening now. No one you know is hurt or dying. You don't have to save anyone and your heart is racing but you know why."
If you can stop and rethink what you were doing at the time and what might have prompted you to react, you can begin to identify what triggers you.
Then you can begin to be aware and avoid (yes, sometimes avoidance is good) such things or at least have grounding techniques in store.
Doesn't always work but it's a start.
Hope that made sense.