Ok. Some say that it's from when we were cavemen and needed it to protect ourselves...and now we don't need it so much but it still kicks in. I personally believe it is the wonderfulness of God's creativity.

It's that when confronted with a traumatic experience, in general, we either stay and fight, or we run away (flight.) With PTSD the problem is that we do that for nearly anything out of the ordinary. Anything that "triggers" us into the time when we were first traumatized, causes the same reactions: fight or flight.

Now if this were a simple brain decision that would be one thing. But it isn't. This is a full fledged chemical reaction of adrenalin (giving strength to fight, or endurance to run/flight) and those chemicals wear on the body, not to mention the surge of feelings that go with the increased adrenalin! Each event becomes a "crises" event to someone with PTSD...until they can learn to manage their reactions...and at least soothe themselves.

Usually what is learned first is avoidance. To try and avoid any situation that might kick them into a trigger response tends to come naturally.

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