Posttraumatic stress disorder (PTSD) is a psychiatric condition that may occur in people who have experienced or witnessed a traumatic event or series of traumatic events. The individual often experience the event or events as emotionally or physically harmful or life-threatening. Examples include, but are not limited to, abuse (physical, sexual, emotional), natural disasters, serious accidents, terrorist acts, war/combat exposure, intimate partner violence, and medical illness. However, most individuals who experience traumas do not go on to develop PTSD.
Many people who are exposed to a traumatic event experience symptoms similar to PTSD symptoms in the days following the event. However, for a person to be diagnosed with PTSD, symptoms must last for more than a month and must cause significant distress or problems in the individual's daily functioning. Many individuals develop symptoms within three months of the trauma, but symptoms may appear later and often persist for months and sometimes years.
TSD can occur in anyone of any ethnicity, nationality or culture, and at any age. The prevalence of PTSD in the U.S. is estimated to be approximately 4% of U.S. adults and 8% of U.S. adolescents aged 13-18. The lifetime prevalence in the U.S. is estimated to be 6%.