Perhaps it would help if I told you about my experience with PTSD. (You must promise not to laugh.) Years ago I ordered a record album (I said years ago) that I really, really wanted. Before it arrived, I picked up a copy of Vincent Bugliosi's book on the Manson murders,
Helter Skelter. Any of you who have read that book know that it is quite graphic and disturbing. While I was reading the book, the album arrived. I immediately put it in the record player, and, while reading the book, I played the record over and over and over again. By the time I finished the book, I could no longer listen to the record album. Every time I did it brought back vivid images from the book, images that were disturbing and terrifying.
This is what PTSD is like. Sensory stimulation brings back memories of an awful experience that you'd just as soon forget.
I once tried to help a woman who had PTSD. She drove a semi in Iraq, hauling military supplies to the various bases and outposts. They were shot at a lot, but one experience lingered on. Her co-driver was driving, in a Volvo cab, at night, when they were attacked. A round hit her co-driver in the head, covering her in blood and brain matter. When she returned to the States she tried to return to work driving a truck. But her company had her doing night runs in a Volvo cab. The sounds and smells of that cab combined with the darkness of the night and the oncoming headlights brought her right back to that awful experience, and she was really struggling to keep her job. I told her to ask her supervisor for two things; day runs and a Freightliner, Mack or Peterbuilt. Anything but a Volvo. Doing that helped her a lot.
It's the triggers that set you off. Familiar sights, sounds, smells, tastes will cause flashbacks. Depending on how traumatic the experience was, the flashbacks can be mild or very severe, taking you right back into a "rerun" of the event. I don't think there's a cure for severe PTSD. It's something you'll have to live with for the rest of your life. It can be mitigated by avoiding the triggers, but that's sometimes really hard to do. But it's not something that normally would cause someone to become violent unless they also suffer from some sort of dissociative disorder. Just because you're having a flashback doesn't mean you become unaware of your surroundings.
PTSD is a fear-based disorder. It's founded upon an event that put you or someone near you in extreme danger. It often involves seeing horrific, appalling injuries to yourself or others. There isn't a single study that links PTSD to aggressive behavior.
cite PTSD can make you hyper-aware of your surroundings, cause you to withdraw from a situation, cause you to avoid interaction with other people or cause you to cry or tremble uncontrollably for a brief period of time until the symptoms subside. If a person is prone to substance abuse (of any kind), then the onset of flashbacks can cause aggressive behavior because of the influence of the substance in removing normal inhibitions to certain behaviors.