Panic disorder is characterized by repeated, unexpected panic attacks, as well as fear of experiencing another episode. A panic disorder may also be accompanied by agoraphobia, which is the fear of being in places where escape or help would be difficult in the event of a panic attack. If you have agoraphobia, you are likely to avoid public places such as shopping malls, or confined spaces such as an airplane.
People with panic disorder often worry about when the next attack will happen and actively try to prevent future attacks by avoiding places, situations, or behaviors they associate with panic attacks. Worry about panic attacks, and the effort spent trying to avoid attacks, cause significant problems in various areas of the person’s life, including the development of agoraphobia (see below).