PTSD stands for Post-Traumatic Stress Disorder. It is a psychiatric disorder that can develop in individuals who have experienced or witnessed a traumatic event such as a natural disaster, a serious accident, physical or sexual assault, war or combat, or the sudden death of a loved one. PTSD causes symptoms such as intrusive thoughts, flashbacks, and avoidance behaviors that can significantly impact an individual's daily life. It is treatable with therapy and medication, but early intervention is crucial for better outcomes.