Post-Traumatic Stress Disorder (PTSD) is a mental health condition that can develop after experiencing or witnessing a traumatic event such as violence, accidents, natural disasters, or abuse. Symptoms include intrusive memories or flashbacks, nightmares, severe anxiety, emotional numbness, and avoidance of reminders of the trauma. PTSD is increasingly recognized in first responders, military personnel, and victims of crime. Canadian healthcare covers PTSD treatment through provincial health systems, and workers' compensation programs in most provinces now recognize PTSD as a workplace injury for first responders. Treatment includes therapy, medication, and support programs.