When someone has a fear of leaving the house and going out in public around people and crowds the condition is called Agoraphobia.
Agoraphobia is a real anxiety disorder that cripples people and prevents people from getting or keeping jobs and sometimes Agoraphobia can be at least somewhat cured and the person can learn to leave their house and go work little by little.
And in some cases the Agoraphobia can be so severe that it can never be cured and the person never leaves their house unless they are able to hide by going out into their car or with someone else to leave the house.
Some people have a slight fear of leaving the house and going out in public but manage to go around people in public.
But some people may not want to leave their house at all as a fear of being embarrassed or not wanting to be around a crowd.