Can you clarify this? Do you mean once someone has PTSD, the affects of it (i.e. anxiety, hyper-vigilance) can become worse again for no reason? That is what makes it a disorder? Sorry, I got confused.
Ok... go back to twisting your neck the wrong way and re-injuring a back injury. You had an injury, being a back injury. You know that if you twist your neck you could re-injure you back! So that is more an action, whether deliberate or not, cause and effect. Twist neck, re-injure back. You aren't injuring for the first time, that already occurred. You're now re-injuring it due to a new action.
PTSD requires zero environmental action to heighten symptoms. You can go to bed and have a nightmare, wakeup and your symptoms are heightened, causing you all sorts of issues in the day. A nightmare is purely psychological, not environmental, hence you aren't re-injuring yourself with a nightmare, it just is a psychological aspect of being human.... yet causes these symptoms to manifest upon waking. Where is the injury in that? Or re-injury?
Disorder delves further than an injury. You can injure yourself physically or psychologically, no argument there. Traumatic Brain Injury (TBI) is an environmental act that causes psychological injury. So if you go to sleep and have no nightmare, yet wakeup in a cold sweat, panicked, then depressed, where is the injury? Where does injury stop and self-manifestation take over? That is leading into a disorder. It wasn't there prior... sure, genetics are present in all mental illness to some degree or another, as we are all unique and different, however; where is the line drawn between interpretative definition!
Where is the injury if you wakeup good, get your day started, then the depression kicks in for absolutely no reason? Depression manifests itself without requiring any environmental factor, hence depression is a disorder, just like anxiety, just like PTSD, as anxiety and depression are the two largest components of PTSD.
For PTSD to be only an injury, without any doubt, then anxiety needs to be a proven injury, along with depression... again, word terminology that has limitations.
I completely understand injury, though it seems the argument for injury tosses disorder out the door in ignorance, hoping someone will just ignore it and go for an emotional politically correct alternative, without understanding the repercussions associated to the primary components that comprise PTSD to begin with.
Militaries would absolutely love PTSD to be called PTSI, again for nothing other than stigma. I did a lot of research on this and that is what generals and key military figures globally continue to cite... the stigma reduction within their military by calling it an injury. Trust me, as a veteran, injury would go over a lot better in the military than disorder for moral and troop cohesion. Though then is PTSD just about the military? What about those in the military who deploy, never get shot at or see action, yet develop PTSD? What is their injury? You would then have to state, which has repercussions, that being in a hostile location by itself is enough to give PTSD. It is in fact enough, though the difference for military is because the threat is against them wearing a uniform and weapon versus a civilian who isn't. The threat assessment isn't the same, even though civilians get killed, they aren't a constant target because of their clothing or location inside a perimeter.
An interesting debate the above would make by itself... do you blanket label entire countries / cities civilians with PTSD because they existed within a hostile environment? I already know the data on that one too... which is it doesn't happen that way because to them that is normal. PTSD occurs when suddenly they know about a different world, ie. non-combat societies. The world is full of refugees who endure this issue already, being once clear of a combat zone and safe, suddenly they display PTSD symptoms and/or get PTSD because they now know difference.
When do we stop manipulating definitions and expanding them to suit a politically correct requirement?