Agoraphobia is a condition that is characterized by the fear of open spaces or being in any environment where escaping is difficult. People with agoraphobia have an intense fear of being in open places such as in a crowd or on public transportation. It is considered an anxiety disorder and people develop it as a result of having a panic disorder. The condition can sometimes be so severe that it interferes with people’s daily lives because in some cases, agoraphobia causes people to never leave their house. It is estimated that about one percent of people in the United States suffer from agoraphobia.