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Anxiety is a feeling of worry, nervousness, or fear about an event or situation. It is a normal reaction to stress. It helps you stay alert for a challenging situation at work, study harder for an exam, or remain focused on an important speech.
Nearly every negative consequence of anxiety comes from the stress that anxiety causes. Muscle tension is also a result of stress. When your fight or flight system is activated-which occurs during times of stress and anxiety-your muscles contract.