Anxiety is an emotion which is characterized by an unpleasant state of
inner turmoil and includes feelings of dread over anticipated events. Anxiety
is different from fear in that fear is defined as the emotional response to a
real threat, whereas anxiety is the anticipation of a future threat. It is
often accompanied by nervous behavior such as pacing back and forth, somatic
complaints, and rumination.
Anxiety is a feeling of uneasiness and worry, usually generalized and
unfocused as an overreaction to a situation that is only subjectively seen as
menacing. It is often accompanied by muscular tension, restlessness, fatigue,
inability to catch one's breath, tightness in the abdominal region, nausea,
and problems in concentration.