Posttraumatic stress disorder (PTSD) is a mental disorder. It could be defined as one or more stressful events of exceptionally threatening nature or stress of an extent that causes trauma ahead. In PTSD, the threat does not necessarily relate to the personal actions of a person, but can also be seen in other experiences (e.g. if a person witnesses a serious accident or an act of violence). PTSD usually occurs within one to six months period after the traumatic event (See Figure 1) and goes with different psychological and psychosomatic symptoms that ...