P.T.S.D stands for "Post Traumatic Stress Disorder" This disorder can be caused by a school shooting, someone physically or verbally abusing you, or someone you care for or you getting seriously injured. Say you got into a car accident, you would then have trigger points. You might get a panic attack from just seeing a car. You also might get a BIG panic attack from seeing a hair style that is the same as the driver of the car that hit you. Sadly though, once you get it, you never fully recover from P.T.S.D.