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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.
There are two reasons that fear exists. First, because anxiety causes fears - it's a symptom of the anxiety itself. Second, because anxiety can also lead to heart and brain symptoms that are considered identical to actual diseases and illnesses. In this article, we'll explore some of the many neurological symptoms of anxiety.