Hoarding is defined as the acquisition of, and inability to discard worthless items even though they appear (to others) to have no value. Hoarding behaviors can occur in a variety of psychiatric disorders and in the normal population, but are most commonly found in people with obsessive-compulsive disorder (OCD). Those people who report compulsive hoarding as their primary type of OCD, experience significant distress or functional impairment from their hoarding.