Tough question.
1st off, my qualifications to respond.
Just another day in paradise Lost my Pilot.... WO1 Brown.
Unfortunately, just one of many. Door gunners lasted a couple of weeks..
After two very violent tours in Vietnam, I am 100% disabled for PTSD.
It ain't fun!
So, as to your question.
The most important thing is to understand what PTSD isn't....
According to the left wing pricks in Hollywood, PTSD makes a person grab an AK47 and head for a school yard.
This just isn't so.
PTSD is a very deep rooted subconscious fear reflex. People with PTSD are hyper alert, tend to avoid crowds and startle at sudden noises.
Different people react to this differently. Some see it as a sign of weakness, others have a very deep seated survivor guilt complex for surviving where their friends didn.t
All of us have learned that it doesn't do any good to attempt to tell non-combat experienced people about it. They just don't have a point of reference and blow it off as a BS war story, or just simply can't understand. So, we tend not to talk about it.
Let me try to explain....
Have you ever lost a loved pet when you were a child? Maybe hit by a car or it just got old and died.
Remember how you felt at the time.... Now, play that emotion over and over and over, once or twice a week for a year!
Only, these loses are not pets, but friends and comrades who you trust with your life and have them trust you with theirs... But, they are killed anyway...
How come you are still alive? Is the next bullet going to take you?
These same people are the ones who stood up and covered every inch ground where they were, no matter what, so that their brothers in arms could live. Terrified? ... probably... But able to function and do whatever was necessary. And still their brothers died...
Some turned to drugs, some to religion, some just ate a bullet.
To Home, To Home.... Only to find their girl didn't wait, and the airheads from the college think they are baby killing murderers.
Interesting perspective isn't it?
Naturally, PTSD is much deeper rooted than that, and much more complicated.
However, as you can see, if you haven't been there, you just can't relate no matter how much you want to.
So, unless he (or she... there are a lot of nurses out there who lost several patients every day, no matter how hard she tried to save them...) brings it up, don't ask.
If they do talk about it, remember to let them do the talking, and don't say you understand.
You Don't.
Hope this helps,
Best Wishes.
Steve