It is common to become anxious in situations such as job interviews, exams, or a public speaking engagement. For some, however, anxiety symptoms become so severe and persistent that they become disabling. In some cases people develop episodes of sudden and intense anxiety, known as panic attacks, with physical symptoms so severe that they may be mistaken for heart disease or a stroke. Some sufferers begin to avoid situations they believe will cause them stress, to the point that they become fearful of restaurants or supermarkets, or even of leaving their homes.





