The people who know I have PTSD don't treat me any differently other than if they know I'm triggered by something, they're really gentle with me and they make sure I'm still "living in the present." However, I can count on one hand the people who know, including my therapist. I live in the deep south (USA) and at least where I'm from, in my town, PTSD isn't understood at all. Not even for military personnel, so it's not worth it for me to explain what I'm going through. People around here just push through stuff and we are raised to just get over it.