Anxiety is defined as a state of uneasiness or apprehension about future uncertainties. It is a state of apprehension, uncertainty, and fear resulting from anticipation of a realistic or fantasized threatening event or situation, often impairing physical and psychological functioning. Everyone experiences anxiety from time to time. This is normal. This is why anxiety is not a medical, biological, chemical, or genetic problem. Anxiety turns into a 'disorder' - disruption to normal functioning - when anxiety and its sensations and symptoms interfere with a normal lifestyle. While each anxiety condition has its own unique features, there are some common symptoms including panic attacks, hot and cold flushes, racing heart, tightening of the chest, quick breathing, restlessness, or feeling tense, excessive fear, worry, catastrophizing, or obsessive thinking, and avoidance of situations that make you feel anxious which can impact on study, work or social life.