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PTSD is marked by clear biological changes as well as psychological symptoms. PTSD is complicated by the fact that people with PTSD often may develop additional disorders such as depression, substance abuse, problems of memory and cognition, and other problems of physical and mental health.
Post-traumatic stress disorder is a mental illness which can develop in a person who witnesses or lives through a traumatic event such as rape, physical abuse, a natural disaster, or a war. The three key signs of PTSD are reliving the event, avoiding thoughts of the event, and hypervigilance.slide 1 of 6.It is very common for someone who experiences a traumatic event to have a strong emotional reaction, but not everyone goes on to develop PTSD.he three key signs of PTSD are reliving the event, avoiding thoughts of the event, and hypervigilance. slide 1 of 6. It is very common for someone who experiences a traumatic event to have a strong emotional reaction, but not everyone goes on to develop PTSD.