I bring all this up because I'm wondering if there is something chemical or neurological in common between the way your touch aversion specifically manifests in your body and the kind of hypersensitivity I have

You know, I've never really thought about it, but I do wonder if it's possible. I have some atypical neurological traits that have never really added up to a diagnosis of anything, but might affect the way I process my PTSD in general? Thanks for bringing this up, I've never really thought of considering it from this angle.