Panic Disorder involves discrete, sudden and unexpected bursts of anxiety known as panic attacks. These may involve rapid heart rate, tightness in the chest, feelings of restricted airflow or suffocation, racing thoughts, sweating, nausea, and the belief that one is losing control, will collapse or go mad. Panic Attacks may be daily and may come to be associated with particular places (bus stops, trains, shopping centres, cinemas). Often Panic Disorder precedes the development of Agoraphobia as the sufferer begins to restrict their movements in order to ‘stay safe’.