We all experience some kind of trauma during our lifetime. Some of us can escape with no enduring effects. But for many, the experiences linger, causing symptoms like flashbacks, nightmares, and negative thoughts that interfere with everyday life. This phenomenon is known as post-traumatic stress disorder, or PTSD.
THIS IS COOL. I WANT TO LEARN SOMETHING ELSE, TOO!
Video via – TED-Ed
Further Readings And References @ National Center For PTSD, NIH, and ADAA
ScienceSwitch 