Agoraphobia is defined as the fear of being alone in public places or situations from which escape is difficult. It affects 1-7% of the population and is often caused by having multiple panic attacks in public, leading to a fear of public places. Symptoms include anxiety and avoidance of situations that could trigger a panic attack. To be diagnosed, the DSM-IV criteria require anxiety about places where help may not be available if a panic attack occurs, along with avoidance of these situations. Treatment involves medication like SSRIs, psychotherapy, and treating any coexisting panic disorder.