According to MayoClinic.com, hoarding affects emotions, thoughts and behavior. Signs and symptoms of hoarding may include:
Cluttered living spaces
Inability to discard items
Keeping stacks of newspapers, magazines or junk mail
Moving items from one pile to another, without discarding anything
Acquiring unneeded or seemingly useless items, including trash
Difficulty managing daily activities, including procrastination and trouble making decisions
Difficulty organizing items
Perfectionism
Excessive attachment to possessions, and discomfort letting others touch or borrow possessions
Limited or no social interactions
via Inside A Central Ohio Hoarder's Nightmare – WCMH: News, Weather, and Sports for Columbus, Ohio.