Headaches that seem like migranes may be tension headaches that come on due to stress. I had a lot of strange headaches when the PTSD got really bad.

I think it is important to remember that most people disassociate at times, and that it is "normal", most people have those moments where they are driving and disassociate to suddenly get startled when they realize they were not paying attention to their driving.

When someone has PTSD, they are more "hyper aware" so anything they begin to notice that might actually be normal, can frighten them. It "is" true that if someone has experienced a trauma, they may not be able to access that challenged area right away and yes, sometimes the person can disassociate when asked to discuss it. One of the things I noticed about disassociation is that when I was challenged in a consistent way by a dysfunctional person, I learned to "tune it out", but I did not realize I did that, and most people don't. One of the things I have noticed is that when people say, "just ignore it and have these "just" deal comments", that is what they are actually telling you to do, "just disassociate yourself". Well, when someone is "hyper aware" they lose the ability to do that. What I found interesting is how my horses/ponies had learned to ignore my neighbor's dogs for years, however, when the dog targeted them which traumatized them, they could no longer "just" ignore that dog being there and their ability to be comfortable in their paddocks also changed too.

We are different and more complex in that we can understand these new threats and find ways to work through them and manage them better and even educate ourselves more about "possible threats". However, human beings typically do not like "change" as any "change" requires developing more skills before settling down into a routine structure again. Those who are older and more established in their structure have a harder time adjusting to
"change". That can be shown in the increase in challenges like "depression and anxiety" in older individuals.