Hoarding disorder (HD) or
Plyushkin's disorder is a
mental disorder
A mental disorder, also referred to as a mental illness, a mental health condition, or a psychiatric disability, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. A mental disorder is ...
characterised by persistent difficulty in parting with possessions and engaging in excessive acquisition of items that are not needed or for which no space is available. This results in severely cluttered living spaces, distress, and impairment in personal, family, social, educational, occupational, or other important areas of functioning.
Excessive acquisition is characterized by repetitive urges or behaviours related to amassing or buying property. Difficulty discarding possessions is characterized by a perceived need to save items and distress associated with discarding them. Accumulation of possessions results in living spaces becoming cluttered to the point that their use or safety is compromised. It is recognised by the
eleventh revision of the International Classification of Diseases
The International Classification of Diseases (ICD) is a globally used medical classification that is used in epidemiology, health management and clinical diagnosis. The ICD is maintained by the World Health Organization (WHO), which is the dir ...
(ICD-11) and the
Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5).
Prevalence rates are estimated at 2% to 5% in adults, though the condition typically manifests in childhood with symptoms worsening in advanced age, at which point collected items have grown excessive and family members who would otherwise help to maintain and control the levels of clutter have either died or moved away.
People with hoarding disorder commonly live with other complex and/or psychological disorders such as
depression,
anxiety
Anxiety is an emotion characterised by an unpleasant state of inner wikt:turmoil, turmoil and includes feelings of dread over Anticipation, anticipated events. Anxiety is different from fear in that fear is defined as the emotional response ...
,
obsessive-compulsive disorder (OCD),
autism spectrum disorder
Autism, also known as autism spectrum disorder (ASD), is a neurodevelopmental disorder characterized by differences or difficulties in social communication and interaction, a preference for predictability and routine, sensory processing di ...
(ASD), and/or
attention deficit hyperactivity disorder
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by symptoms of inattention, hyperactivity, impulsivity, and emotional dysregulation that are excessive and pervasive, impairing in multiple con ...
(ADHD). Other factors often associated with hoarding include alcohol dependence and paranoid,
schizotypal and avoidant traits.
Diagnosis
Collecting
The hobby of collecting includes seeking, locating, acquiring, organizing, cataloging, displaying, storing, and maintaining items that are of interest to an individual ''collector''. Collections differ in a wide variety of respects, most obvi ...
and hoarding may seem similar, but there are distinct characteristics that set the behaviors apart. Collecting is a
hobby
A hobby is considered to be a regular activity that is done for enjoyment, typically during one's leisure time. Hobbies include collecting themed items and objects, engaging in creative and artistic pursuits, playing sports, or pursuing other ...
often involving the targeted search and acquisition of specific items that form—at least from the perspective of the collector—a greater appreciation, deeper understanding, or increased synergistic value when combined with other similar items. Hoarding, by contrast, typically appears haphazard and involves the overall acquiring of common items that would not be especially meaningful to the person who is gathering such items in large quantities. People who hoard keep common items that hold little to no meaning or value to others, unlike some collectors, whose items may be of great value to select people. Most hoarders are disorganized, and their living areas are crowded and in disarray. Most collectors can afford to store their items systematically or to have enough room to display their collections. Age, mental state, or finances have caused some collectors to fall into a hoarding state.
Clutter Image Rating

A UK charity called Hoarding UK has found that people have very different ideas about what it means to have a cluttered home. For some, a small pile of things in the corner of an otherwise well-ordered room constitutes serious clutter. For others, only when the narrow pathways make it hard to get through a room does the clutter register. To ensure an accurate sense of a clutter problem and encourage people to get support, Hoarding UK uses the Clutter Image Rating, created by R. O. Frost and G. Steketee, a series of pictures of rooms in various stages of clutter—from completely clutter-free to very severely cluttered.
Epidemiology
The prevalence of hoarding disorder is estimated to be between 2 and 6 percent, although some surveys indicate the lifetime prevalence may be as high as 14%.
First-degree relatives of those with hoarding disorder are significantly more likely to report hoarding symptoms, and hoarding likely comes about due to a combination of genetic and environmental factors.
Rates of hoarding increase significantly with age, and people over the age of 54 are three times as likely to meet criteria for hoarding disorder. However, hoarding symptoms typically manifest in early childhood, and worsen to the point of becoming clinically significant during middle age. Over half of hoarders report the onset of hoarding as being associated with a traumatic life event, and in this portion of hoarders, the age of onset is much higher. Epidemiological studies have found that hoarding is twice as common in males, although clinical studies on hoarding tend to be predominantly female, suggesting that male hoarders are a significantly understudied and under-treated population.
Hoarding is a significant problem around the world and can pose a public health risk when hoarding escalates enough to damage the integrity of a structure or attract
vermin
Vermin (colloquially varmint(s) or varmit(s)) are pests or nuisance animals that spread diseases and destroy crops, livestock, and property. Since the term is defined in relation to human activities, which species are included vary by regi ...
. Accumulated items can block exits during fires and increase the risk of injury. In Japan, hoarder houses are known as , and have become a topic of public alarm in Japanese mass media. In the Eastern United States, they are sometimes called Collyer mansions or Collyers, after the infamous
Collyer brothers.
Comorbidity
Under the
DSM-IV
The ''Diagnostic and Statistical Manual of Mental Disorders'' (''DSM''; latest edition: ''DSM-5-TR'', published in March 2022) is a publication by the American Psychiatric Association (APA) for the classification of mental disorders using a com ...
, hoarding was listed as a symptom of
obsessive–compulsive personality disorder and
obsessive–compulsive disorder
Obsessive–compulsive disorder (OCD) is a mental disorder in which an individual has intrusive thoughts (an ''obsession'') and feels the need to perform certain routines (''Compulsive behavior, compulsions'') repeatedly to relieve the dis ...
; however, hoarding was found to have a relatively weak connection to OCD or OCPD compared to their other symptoms. Due to this evidence, hoarding disorder was separated as its own disorder in the
DSM-5
The ''Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition'' (DSM-5), is the 2013 update to the '' Diagnostic and Statistical Manual of Mental Disorders'', the taxonomic and diagnostic tool published by the American Psychiat ...
.
However, hoarding does frequently co-occur with OCD. OCD patients with hoarding symptoms were found to display a distinct form of hoarding in which they were more likely to hoard "bizarre items" and perform compulsive rituals associated with their hoarding behavior, such as rituals around checking items or rituals to be performed before discarding them.
However, the majority of hoarders do not show OCD symptoms. Hoarding has been found to be correlated with
depression,
social anxiety
Social anxiety is the anxiety and fear specifically linked to being in social settings (i.e., interacting with others). Some categories of disorders associated with social anxiety include anxiety disorders, mood disorders, autism spectrum dis ...
, compulsive grooming disorders such as
trichotillomania
Trichotillomania (TTM), also known as hair-pulling disorder or compulsive hair pulling, is a mental disorder characterized by a long-term urge that results in the pulling out of one's own hair. A brief positive feeling may occur as hair is rem ...
,
bipolar disorder
Bipolar disorder (BD), previously known as manic depression, is a mental disorder characterized by periods of Depression (mood), depression and periods of abnormally elevated Mood (psychology), mood that each last from days to weeks, and in ...
, reduced cognitive and affective
empathy
Empathy is generally described as the ability to take on another person's perspective, to understand, feel, and possibly share and respond to their experience. There are more (sometimes conflicting) definitions of empathy that include but are ...
and
compulsive shopping.
Hoarders have higher than average rates of traumatic past events, particularly those associated with loss or deprivation. Past events which occurred before the onset of hoarding are correlated to a subject's emotional attachment to physical objects, and past events after the onset of hoarding increase a subject's anxiety around memory. Hoarders are also more likely to have a past with alcohol abuse.
The prevalence of different comorbidities is influenced by gender. In men, hoarding is associated with
generalized anxiety disorder
Generalized anxiety disorder (GAD) is an anxiety disorder characterized by excessive, uncontrollable and often irrational worry about events or activities. Worry often interferes with daily functioning. Individuals with GAD are often overly con ...
and
tics, while among women, hoarding is associated with
social phobia
Social anxiety disorder (SAD), also known as social phobia, is an anxiety disorder characterized by sentiments of fear and anxiety in social situations, causing considerable distress and impairing ability to function in at least some as ...
,
post-traumatic stress disorder
Post-traumatic stress disorder (PTSD) is a mental disorder that develops from experiencing a Psychological trauma, traumatic event, such as sexual assault, domestic violence, child abuse, warfare and its associated traumas, natural disaster ...
,
body dysmorphic disorder
Body dysmorphic disorder (BDD), also known in some contexts as dysmorphophobia, is a mental disorder defined by an overwhelming preoccupation with a perceived flaw in one's physical appearance. In BDD's delusional variant, the flaw is imagined ...
, and compulsive grooming behaviors like nail-biting and
skin-picking.
Studies
In a 2010 study using data from self-reports of hoarding behavior from 751 participants, it was found most reported the onset of their hoarding symptoms between the ages of 11 and 20 years old, with 70% reporting the behaviors before the age of 21. Fewer than 4% of people reported the onset of their symptoms after the age of 40. The data showed that compulsive hoarding usually begins early, but often does not become more prominent until after age 40. Different reasons have been given for this, such as the effects of family presence earlier in life and limits on hoarding imposed by housing situation and lifestyle. The understanding of early onset hoarding behavior may help in the future to better distinguish hoarding behavior from "normal" childhood collecting behaviors.
A second key part of this study was to determine if stressful life events are linked to the onset of hoarding symptoms. Similar to
self-harm
Self-harm refers to intentional behaviors that cause harm to oneself. This is most commonly regarded as direct injury of one's own skin tissues, usually without suicidal intention. Other terms such as cutting, self-abuse, self-injury, and s ...
ing, traumatized persons may create a problem for themselves in order to avoid their real anxiety or trauma. Facing their real issues may be too difficult for them, so they create an artificial problem (in their case, hoarding) and prefer to battle with it rather than determine, face, or do something about their real anxieties. Hoarders may suppress their psychological pain by hoarding. The study shows that adults who hoard report a greater lifetime incidence of having possessions taken by force, forced sexual activity as either an adult or a child, including forced sexual intercourse, and being physically handled roughly during childhood, thus proving traumatic events are positively correlated with the severity of hoarding. For each five years of life the participant would rate the severity of their hoarding symptoms from 1 to 4, 4 being the most severe. Of the participants, 548 reported a chronic course, 159 an increasing course and 39 people, a decreasing course of illness. The incidents of increased hoarding behavior were usually correlated to five categories of stressful life events.
Although excessive acquiring is not a diagnostic criterion of hoarding, at least two-thirds of individuals with hoarding disorder excessively acquire possessions.
Having a more anxiously attached interpersonal style is associated with more compulsive buying and greater acquisition of free items and these relationships are mediated by stronger distress intolerance and greater
anthropomorphism
Anthropomorphism is the attribution of human traits, emotions, or intentions to non-human entities. It is considered to be an innate tendency of human psychology. Personification is the related attribution of human form and characteristics t ...
. Anthropomorphism has been shown to increase both the sentimental value and perceived utility of items. These findings indicate that individuals may over-value their possessions to compensate for thwarted interpersonal needs. Feeling alone and/or disconnected from others may impair people's ability to tolerate distress and increase people's tendencies to see human-like qualities in objects. The humanness of items may increase their perceived value and individuals may acquire these valued objects to alleviate distress. Individuals with hoarding problems have been shown to have greater interpersonal problems than individuals who only excessively acquire possessions, which provides some support for the assumption that individuals with hoarding problems may have a stronger motivation to hang onto possessions for support. As possessions cannot provide support in the way humans can and because saving excessively can frustrate other people due to its impact on their quality of life, individuals with hoarding disorder may be caught in a feedback loop. They may save to alleviate distress, but this saving may cause distress, which may lead them to keep saving to alleviate the distress.
Treatment
Cognitive-behavioral therapy (CBT) is a commonly implemented therapeutic intervention for compulsive hoarding. As part of cognitive behavior therapy, the therapist may help the patient to:
* Discover why one is compelled to hoard.
* Learn to organize possessions in order to decide what to discard.
* Develop decision-making skills.
*
Declutter the home during in-home visits by a therapist or
professional organizer
Decluttering means removing unnecessary items, sorting and arranging, or putting things back in place. This article deals with organizing places of residence and commercial buildings, but the principles can also be applied to other areas. The a ...
.
* Gain and perform relaxation skills.
* Attend family and/or group therapy.
* Be open to trying psychiatric hospitalization if the hoarding is serious.
* Have periodic visits and consultations to keep a healthy lifestyle.
This modality of treatment usually involves
exposure and response prevention to situations that cause anxiety and
cognitive restructuring of beliefs related to hoarding. Furthermore, research has also shown that certain CBT protocols have been more effective in treatment than others. CBT programs that specifically address the motivation of the affected person, organization, acquiring new clutter, and removing current clutter from the home have shown promising results. This type of treatment typically involves in-home work with a therapist combined with between-session
homework
Homework is a set of tasks assigned to students by their teachers to be completed at home. Common homework assignments may include required reading, a writing or typing project, Exercise (mathematics), math problems to be completed, informatio ...
, the completion of which is associated with better treatment outcomes.
Research on internet-based CBT treatments for the disorder (where participants have access to educational resources, cognitive strategies, and chat groups) has also shown promising results both in terms of short- and long-term recovery.
Other therapeutic approaches that have been found to be helpful:
#
Motivational interviewing originated in addiction therapy. This method is significantly helpful when used in hoarding cases in which insight is poor and ambivalence to change is marked.
#
Harm reduction
Harm reduction, or harm minimization, refers to a range of intentional practices and public health policies designed to lessen the negative social and/or physical consequences associated with various human behaviors, both legal and illegal. H ...
rather than symptom reduction. Also borrowed from addiction therapy. The goal is to decrease the harmful implications of the behavior, rather than the hoarding behaviors.
#
Group psychotherapy
Group psychotherapy or group therapy is a form of psychotherapy in which one or more therapists treat a small group of clients together as a group. The term can legitimately refer to any form of psychotherapy when delivered in a group format, i ...
reduces social isolation and social anxiety and is cost-effective compared to one-on-one intervention.
Group CBT tends to have similar outcomes to individual therapy. Although group treatment often does not include home sessions, experimental research suggests that treatment outcomes may be improved if home sessions are included. Individuals have been shown to discard more possessions when in a cluttered environment compared to a tidy environment. Indeed, a meta-analysis found that a greater number of home sessions improves CBT outcomes.
Individuals with hoarding behaviors are often described as having low motivation and poor compliance levels, and as being indecisive and
procrastinators, which may frequently lead to premature termination (i.e., dropout) or low response to treatment.
Therefore, it was suggested that future treatment approaches, and pharmacotherapy in particular, be directed to address the underlying mechanisms of cognitive impairments demonstrated by individuals with hoarding symptoms.
Mental health professionals frequently express frustration regarding hoarding cases, mostly due to premature termination and poor response to treatment. Patients are frequently described as indecisive, procrastinators, recalcitrant, and as having low or no motivation,
which can explain why many interventions fail to accomplish significant results. To overcome this obstacle, some clinicians recommend accompanying individual therapy with home visits to help the clinician:
Likewise, certain cases are assisted by professional organizers as well.
In popular culture
There have been several television shows that focused on those suspected to have hoarding disorder.
''Hoarders'', an ongoing series by
A&E, focuses on helping one or two individual "hoarders" per episode and features a rotating cast of professional psychologists and organizers who specialize in hoarding disorder. A similar show, ''
Hoarding: Buried Alive'' ran from 2010 to 2014 on
TLC
TLC may refer to:
Arts and entertainment Television
* ''TLC'' (TV series), a 2002 British situational comedy television series that aired on BBC2
* TLC (TV network), formerly the Learning Channel, an American cable TV network
** TLC (Asia), an A ...
. ''Hoarders: Canada'' followed a similar format to ''Hoarders'' and ''Hoarding: Buried Alive.'' ''Britain's Biggest Hoarders'' is an ongoing series hosted by
Jasmine Harman, the daughter of a hoarder, and follows her as she and a team of experts seek to help others with the disorder. ''
The Hoarder Next Door'' is a four-part series based in Britain that followed a group of hoarders participating in a treatment program led by psychotherapist Stelios Kiosses. ''Confessions: Animal Hoarding'' is a six-episode series aired on
Animal Planet that focused on those who hoard animals and their living conditions. ''Hoarder House Flippers'' is more focused on the hoarded house, where teams work hard to flip properties that have been hoarded.
There have been possible depictions of hoarding in literature before the diagnosis was created. In
Nikolai Gogol’s book ''
Dead Souls'' (1842), wealthy
Plyushkin displays hoarding behaviors. For example, he serves an old cake from years ago to a business partner, having a servant scrape off the mold. He is famous among the locals for his compulsion to find and keep items.
''
Le Cousin Pons'', a novella written by
Honoré de Balzac
Honoré de Balzac ( , more commonly ; ; born Honoré Balzac; 20 May 1799 – 18 August 1850) was a French novelist and playwright. The novel sequence ''La Comédie humaine'', which presents a panorama of post-Napoleonic French life, is ...
in 1846, features Pons, who hoards art and antiques. He collected relatively low-value items, hoping they would become more valuable with time. However, he is unwilling to part with any of his items even when he becomes destitute. He dies with his collection intact.
In
Charles Dickens
Charles John Huffam Dickens (; 7 February 1812 – 9 June 1870) was an English novelist, journalist, short story writer and Social criticism, social critic. He created some of literature's best-known fictional characters, and is regarded by ...
's ''
Bleak House
''Bleak House'' is a novel by English author Charles Dickens, first published as a 20-episode Serial (literature), serial between 12 March 1852 and 12 September 1853. The novel has many characters and several subplots, and is told partly by th ...
'' (1862), London shop owner Krook hoards items, primarily legal documents. He continues to buy items but doesn't sell any, even though he claims he buys to sell later for a profit. Several documents that would resolve a legal case central to the novel's plot are lost among his hoard.
Emily Maguire wrote ''Love Objects'' in 2021, a novel about a woman with hoarding disorder that focused on the behavior and the consequences of a hoarder being exposed.
See also
Hoarders
*
Alexander Kennedy Miller, hoarded about 30
Stutz automobiles (19061993)
*
Collyer brothers, Homer Collyer (18811947) and Langley Collyer (18851947)
*
Edmund Trebus (19182002), participated in TV documentary
*
Edith Bouvier Beale and
Edith Ewing Bouvier Beale, American socialites featured in the 1975 documentary ''
Grey Gardens''
References
Further reading
*
*
* Article discussing the disorder and its relationship to
OCD.
*
External links
The ICD Clutter–Hoarding ScaleHoardingUK
{{Authority control
Obsessive–compulsive or related disorders