Difficulty discarding or parting with possessions, regardless of their value. This difficulty is due to a perceived need to save the items and to distress associated with discarding them. The difficulty discarding possessions results in the accumulation of possessions that congest and clutter active living areas and substantially compromises their intended use. The hoarding causes clinically significant distress or impairment in social, occupational, or other important areas of functioning. The hoarding is not attributable to another medical condition.

Source: adapted from reference 8 (p. 247)