Flashback: A flashback is when someone suddenly and vividly re-experiences parts of a traumatic event as if they were happening again.
Post-Traumatic Stress Disorder (PTSD):PTSD is a psychiatric disorder characterized by persistent anxiety and distressing symptoms that develop after exposure to an extremely stressful or traumatic event.
Trauma:Trauma refers to any deeply distressing or disturbing experience that overwhelms an individual's ability to cope, leading to emotional and psychological harm.