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Symptoms of Anxiety. Symptoms of Anxiety: Introduction. The symptoms of anxiety are due to the body's reaction to stress called the fright, fight or flight response. This reaction developed in early human evolution as a means to increase alertness and readiness to react to dangerous stressors, such as the threat of a man-eating predator.
So anxiety symptoms are actually symptoms of stress. They are called anxiety symptoms because behaving apprehensively is the main source of the stress that overly stresses the body, which then, causes the body to exhibit symptoms.