Eh, I always wondered whether I have PTSD or something on the autistic spectrum, I've got almost all the symptoms of PTSD, and its diagnosed through the VA, abut I have a few symptoms of autism. Namely sleep problems, depression, liking to be alone, and not liking to be hugged or generally touched, and avoiding situations where people can see my body.
Then again, I'm covered in surgery scars, burn scars, general scars, and it makes people uncomfortable if they see me without a shrit, and now pants thanks to the burn scars, my parents were excessively restrictive about who I associated with as a kid (namely any human who has ever lived), I didn't get my first hug until I was 21, and the depression thing is hard to avoid when your body is broken and you spend most of your life alone with an annoyingly vocal dog.
PTSD was just considered more likely, since I did have my shit fucked the hell up, was in the military, and ptsd and alcoholism go hand in hand, and alcoholism can lead to all sorts of symptoms of other mental illnesses, especially bipolar.
I'm probably on the spectrum, but whether that is genetic or a result of trauma is anyone's guess.