In this chapter we examine the idea of Hoarding Disorder. This relatively new diagnosis was first described in the American Psychiatric Association’s Diagnostic and Statistical Manual which was published in 2013. Hoarding Disorder is used to describe hoarding which is associated with an extreme attachment to items which are hoarded. Although people with Hoarding Disorder may suffer from other problems such as depression and anxiety, in Hoarding Disorder it is thought that the hoarding is not due to another diagnosis or problem. However, how Hoarding Disorder can present with other diagnoses, as well as the concept of conditions with increased risk taking and impulsivity and how they can be linked, even in the same person with increased compulsivity and avoidance of risk. Because the concept of Hoarding Disorder has only been described relatively recently, there is a lack of research in this area. Whereas Hoarding Disorder is often described in the elderly or late middle-aged, it is thought to have its roots in childhood. In this chapter we will examine the presentation of Hoarding Disorder in all age groups.

As well as examining the description and diagnosis of Hoarding Disorder, in this chapter we will also look at the risks inherent in the hoarding itself as well as the risk of suicide. Theories and research about the possible causes of Hoarding Disorder will be discussed.