PTSD can develop after living through or witnessing something traumatic, and it often shows up as flashbacks, nightmares, or a nervous system that stays on high alert long after the danger has passed. It's not a sign of weakness, it's how your brain tried to protect you.
Therapists supporting clients with PTSD focus on helping you feel safe in your body again, at a pace that doesn't overwhelm you. That might include grounding techniques, processing what happened when you're ready, and approaches like EMDR or trauma-focused CBT. The goal is to help the memory feel less like it's happening right now, so it stops running your daily life.