Anxiety is an emotion characterised by an unpleasant state of inner turmoil, often accompanied by nervous behaviour such as pacing back and forth, somatic complaints, and rumination.   It is the subjectively unpleasant feelings of dread over anticipated events, such as the feeling of imminent death.  Anxiety is not the same as fear, which is a response to a real or perceived immediate threat,  whereas anxiety involves the expectation of future threat.   Anxiety is a feeling of uneasiness and worry, usually generalised and unfocused as an overreaction to a situation that is only subjectively seen as menacing and can result in tension, restlessness, fatigue and problems in concentration. Anxiety can be appropriate, but when experienced regularly the individual may suffer from an anxiety disorder.