Agoraphobia is an anxiety disorder.
People with agoraphobia avoid being in certain places or situations because they are afraid they will have no way to escape or will be overwhelmed with panic and have no help. For example, you might develop an intense fear of driving, crossing bridges, or being in shopping malls. You might become afraid of the reactions you will have in these situations. The fears can disable you. At their most extreme, they can prevent you from ever leaving your home.