Those at increased risk for developing PTSD (post traumatic stress disorder) include women and the previously married (Kessler et al., 1995). Another risk factor for developing PTSD include being exposed to a trauma, where 9.2% develop PTSD after a trauma. Assaultive violence has the highest risk of developing PTSD, where 20.9% develop PTSD. Losing a loved one unexpectedly is another risk factor for PTSD, where 14.3% develop PTSD (Breslau et al., 1998). Finally, up to 17% of Vietnam War Veterans and Iraq War Veterans have PTSD from combat exposure (Richardson et al., 2010).
The following video further explains how PTSD develops, and how you can treat it: