Piper is diagnosed with agoraphobia because she experiences intense fear and anxiety of being outside the home alone enclosed spaces blood heights

Piper is diagnosed with agoraphobia because she experiences intense fear and anxiety of   being outside the home alone

Agoraphobia is a psychological disorder that caused people to falsely perceive that the environment around them are dangerous.
This disorder make those people experience unreasonable fear whenever they're in the place that they're not familiar with (such as outside their home)