Definition of Panic disorder with agoraphobia:

Panic disorder with agoraphobia is an anxiety disorder in which there are repeated attacks of intense fear and anxiety, and a fear of being in places where escape might be difficult, or where help might not be available.

Agoraphobia usually involves fear of crowds, bridges, or of being outside alone.

This article discusses panic disorder with agoraphobia. For information on panic disorder itself, see also: Panic disorder

Causes, incidence, and risk factors:

The exact causes of panic disorder and agoraphobia are unknown. Because panic attacks often occur in areas or situations where they have happened in the past, panic may be a learned behavior. Agoraphobia sometimes occurs when a person has had a panic attack and begins to fear situations that might lead to another panic attack.

Anyone can develop a panic disorder, but it usually starts around age 25. Panic disorder is more common in women than men.