It is hard to talk about PTSD. Not only because it means talking about painful pasts, but because it's hard to explain to someone who hasn't experienced it. (Not that those who have it want the whole world to experience it so they know how they feel.)
When talking about it to others I say I feel on edge and jittery. But it is so much more than that. I have found others to put into words what even I cannot.
It is hard to understand for me, even though I have it. But it isn't the over glorified thing it seems to have become. It is dark and hard and sad and makes coping with normal life almost impossible.