Answer: Phobic disorder
Step-by-step explanation:
Phobic disorder is type of disorder that induces extreme anxiety and fear as a response in a person in particular situation due to people, object or other things.The person faces phobia as he/she comes in contact with the phobia-causing source.
According to the question,Larry's mother might be suffering from phobic disorder which causes anxiety and distress to her when she comes in contact with mall environment.She tends to become extremely anxious within ten minutes of exposure in mall leading to suffocation-like feeling.