Traumatized 

Someone expressed that whenever he was seeing the road he used to take to get to that treatment place, he still gets violent flashes of what he went through there, and feels like taking another route to get where he's going, when possible.

He also often gets these violent flashes at any time, horrible memories being triggered by any random everyday life events here and there, which can cause discouragements, insecurities, to name just a few.

This is being called traumatism. 

Article #5 of the Human Rights:

No one shall be subjected to torture or to cruel, inhuman or degrading treatment or punishment.