Traumatic stress is in the human body suffered from external forces, trauma occurs when the body is to out a little stress response, when the body to react, some changes will occur, such as trauma after pain, blood loss, this situation and some tension, fear, which can cause a series of body reactions. The major organs will have some reaction, for example, after blood loss may cause the whole body’s blood vessels to constrict, to maintain the blood supply of vital organs, there will be some corresponding situations, such as the appearance of peripheral blood circulation to be poor, pallor, blood loss after the reduction of peripheral circulation. Some of the major organs will show corresponding symptoms of ischemia, such as the heart, brain tissue may be the most sensitive, but also the most responsive to us. After the occurrence of trauma, the body will appear a lot of stress response, this is the body’s self-protection mechanism, after the emergence of this, for our clinical such as diagnosis and treatment to provide some basis, but also suggests that our next step in the treatment should start from, and another can determine the degree of damage caused by trauma.