By eHow Health Editor
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Conditions for developing acute stress disorder stem from experiencing a traumatic event. The trauma comes about when a person witnesses death, physical harm, violence or severe injury. The person reacts to the trauma by feeling helpless, fearful or horrified to the point of being unable to function normally. In World War I, the battlefield's death and horror caused many soldiers to experience "shell shock," otherwise known as acute stress disorder.
eHow Health Editor