Re-thinking "triggers"

What does it mean when you’re triggered? Does it really mean the same thing every time?

Being “triggered," or compulsive, or tempted do something relieving that you know will harm you negatively in the long run is an undeniable sign that you’re under some form of distress and discomfort. 

When we’re triggered, tempted, and compulsive, it’s always because our brain wants to escape or find relief from something.

So the immediate question to always ask is...

What from?