Hoarding disorder is when an individual has a persistent difficulty discarding or separating with possessions because of a perceived need to save them. People often hoard because they believe that an item will be useful to them in the future. Or they feel that is has sentimental value, is irreplaceable or too big of a deal to throw away. Hoarding is a disorder that may be present on its own or a symptom of another disorder. The most often associated with hoarding are obsessive-compulsive disorder and or attention deficit/hyperactivity disorder.