It can arise after significant trauma and cause flashbacks, severe anxiety, nightmares, and extreme sadness.

它可能在严重的创伤后出现，引起闪回，严重的焦虑，噩梦和极度的悲伤。

He suffered toxic confusional states in which he became agitated, experiencing severe anxiety and visual hallucinations.

他遭受着中毒性的恍惚状态,他变得焦躁不安, 极度忧虑并产生幻觉.

Or take a veteran with PTSD who develops severe anxiety when out in public, terrified that something bad is going to happen.

我们再举一个例子，一个患有创伤后应激障碍的退伍老兵，每当在公共场合都会产生严重的焦虑，害怕会有糟糕的事情发生。