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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.
You might be irritable or easily scared. You might even feel depressed because of your constant state of worry and stress. Eventually, chronic anxiety can cause long-term symptoms including muscle aches, sweating, fatigue, upset stomach, shaking, and insomnia. During a panic attack, you may have trouble breathing, and you may experience symptoms of dizziness, blurred vision, and rapid heartbeat.