Anxiety is both a psychological and a physiological state and includes cognitive, somatic, emotional, and behavioral components. These components, put together, produce an unpleasant feeling, which is usually associated with unease, apprehension, fear, or worry. Whereas fear leads to behaviors such as escape and avoidance, anxiety occurs as a consequence of threats that are perceived to be uncontrollable or unavoidable.
Anxiety is a normal reaction to stress. It acts to help a person deal with a difficult situation by prompting and enabling the person to cope with it. While anxiety can be adaptive, when it becomes excessive, it may manifest as an anxiety disorder, and such disorders may become important medical problems.
Anxiety acts to alert the person to the possible risks within the environment so that the person can manage them appropriately. Anxiety can cause a number of physical effects, which include heart palpitations, muscle weakness and tension, fatigue, nausea, chest pain,...
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