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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.
Symptoms. All anxiety disorders share some general symptoms: Panic, fear, and uneasiness; Sleep problems; Not being able to stay calm and still; Cold, sweaty, numb or tingling hands or feet; Shortness of breath; Heart palpitations; Dry mouth; Nausea; Tense muscles; Dizziness; Causes. Researchers donât know exactly what brings on anxiety disorders.