Agoraphobia is characterized as having anxiety or panic attack about being in places or situations from which escape might be difficult (or embarrassing) or in which you may not be able to get help. People who suffer from agoraphobia might feel anxious about being home alone, leaving home, crowded places such as malls or stores, driving, being on a bridge, and or any place where it may seem difficult to get out or leave.
The degree to one which has agoraphobic behavior can vary. Some seem to live essentially normal lives with the capability of avoiding certain anxiety producing situations while others are totally housebound (in their safe zone). A safe zone is by definition an area or situation that brings about the least amount of anxiety. People with agoraphobia often have the need for a companion. If you have agoraphobia, avoidance behaviors often quickly multiply and daily life can become more and more difficult outside the safe zone.