Agoraphobia is an anxiety disorder precipitated by the fear of having a symptom attack or panic attack in a setting from which there is no easy means of escape. As a result, sufferers of agoraphobia may avoid public and/or unfamiliar places. In severe cases, the sufferer may become confined to their home, experiencing difficulty traveling from this "safe place."

Agoraphobia is a condition where the sufferer becomes anxious in environments that are unfamiliar or where he or she perceives that they have little control. Triggers for this anxiety may include crowds, wide open spaces or traveling, even short distances. This anxiety is often compounded by a fear of social embarrassment, as the agoraphobic fears the onset of a panic attack and appearing distraught in public.

Agoraphobics may experience panic attacks in situations where they feel trapped, insecure, out of control or too far from their personal comfort zone. In severe cases, an agoraphobic may be confined to his or her home. Many people with agoraphobia are comfortable seeing visitors in a defined space that they feel in control of. Such people may live for years without leaving their homes, while happily seeing visitors in and working from their personal safety zones. If the agoraphobic leaves his or her safety zone, they may experience a panic attack.

There is no one single cause associated with agoraphobia. Instead, there are a number of factors that contribute to the development of agoraphobia. These factors include:

Family Factors:
- Having an anxious parent role model.
- Being abused as a child.
- Having an overly critical parent.
- Personality Factors:
- High need for approval.
- High need control.
- Oversensitivity to emotional stimuli.

Biological Factors:
- Oversensitivity to hormone changes.
- Oversensitivity to physical stimuli.
- High amounts of sodium lactate in the bloodstream.

Agoraphobia can be successfully treated in many cases through a very gradual process of graduated exposure therapy combined with cognitive therapy and sometimes anti-anxiety or antidepressant medications. Treatment options for agoraphobia and panic disorder are similar.

Good article Dreamer. =D

I would just like to add 75% of diagnosed with agoraphobia have a comorbid Panic Disorder. However, it is not necessary to suffer from panic attack for a diagnosis of agoraphobia to be made.