I've seen those tv shows about people who are compulsive hoarders.  Do you know much about that?
Yes, compulsive hoarding is when a person has a problem with obsessively acquiring and failing to discard objects that cover the living areas of their home
Some of those shows, I just cannot understand why people would live like that.  Is it considered a mental illness?
Well it is a disorder that is associated with health risks, impaired functioning, and adverse effects on friends and family.
Is there a treatment or a medication for it?
Well it has only been defined as a mental disorder since 2013, so research on hoarding is just beginning
I imagine it is very hard on the family as well.  And it's so unhealthy with all the bugs and such.
Yeah, it's currently unclear if hoarding is separate from OCD or if it is symptom of OCD