Agoraphobia is a medical condition that causes anxiety. Sufferers are afraid of large open spaces, crowds, and new places. Many doctors believe that people with the condition are afraid of becoming anxious. Places that make them feel unsafe and increase their feelings of anxiety and panic. They may be afraid they might lose control and embarrass themselves. They worry that they may not be able to get away, or find help if they have a panic attack. The word "agoraphobia" means "fear of the market place". People with agoraphobia often believe that their home is the only safe place. Extreme sufferers may be unable to leave their homes for months or in some cases years.