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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.
Being Afraid: An Anxiety Cause and Symptom. Anxiety is, in a sense, fear. Anxiety isn't necessarily being afraid of anything, but anxiety is the activation of your fight or flight system - the system that is triggered by fear. This is one of the issues that makes anxiety so confusing.