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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.
That can happen too. Anxiety causes several changes and symptoms that can actually create fear even when fear wasn't there. Symptom Fear One of the most common reasons that anxiety causes you to be afraid is because anxiety can cause you to fear the symptoms.