Factitious Disorder (FD) is a DSM-5 mental disorder defined by deliberate falsification of physical or psychological signs or symptoms — or induction of injury or disease — without obvious external rewards. It is distinguished from malingering (which is faking for tangible gain like money, drugs, or avoiding work) by the absence of external incentives. The motivation appears internal: the patient assumes the "sick role" for psychological reasons. The variant in which the falsification is imposed on another (often a child) is among the most serious forms of medical child abuse.
Key Facts
- Prevalence: estimated ~1% of hospitalized patients; likely under-recognized
- More common in healthcare workers and those with prior medical exposure
- Associated with high healthcare utilization and significant medical morbidity
- Factitious Disorder Imposed on Another (FDIA) is a form of child abuse
- Treatment is difficult; patients typically reject psychiatric framing
DSM-5 Diagnostic Criteria
Factitious Disorder Imposed on Self (300.19 / F68.10)
- Falsification of physical or psychological signs or symptoms, or induction of injury or disease, associated with identified deception
- Person presents themselves to others as ill, impaired, or injured
- Deceptive behavior is evident even in the absence of obvious external rewards
- Behavior is not better explained by another mental disorder
Factitious Disorder Imposed on Another (300.19 / F68.A)
Same criteria but the falsification is imposed on another person, typically a child or dependent adult. The diagnosis is given to the perpetrator, not the victim.
Factitious Disorder Imposed on Another (FDIA)
- Formerly called Munchausen Syndrome by Proxy
- A perpetrator (typically a parent) fabricates, exaggerates, or induces illness in a victim (typically a child) to gain medical attention
- Victim subjected to unnecessary medical procedures, hospitalizations, treatments — sometimes harmful or fatal
- Mortality rate in pediatric victims: 6–10%
- Recognized as medical child abuse regardless of the perpetrator's psychiatric diagnosis
- Mandated reporting required in suspected cases
- Identification typically requires multidisciplinary review (medical, psychiatric, child protection)
Factitious Disorder vs. Malingering
- Factitious disorder: No external incentive; motivation appears to be assumption of the sick role itself. Considered a mental disorder.
- Malingering: Clear external incentive (financial gain, drugs, avoiding work, evading legal consequences). Not a mental disorder; it is a behavior that may occur in any context.
- Both involve intentional deception; the distinction is motive
- Distinction can be difficult and sometimes both factors operate
Common Presentations
- Inconsistent or implausible medical histories
- Multiple hospitalizations across many institutions
- Symptoms that don't match objective findings
- Eagerness for invasive tests and procedures
- Dramatic, atypical, or pseudologia fantastica histories
- Healthcare worker or strong medical knowledge
- Resistance to discharge or to psychiatric consultation
- Symptoms worsen when discharge is approaching
- Self-induced injuries or illness (injecting fecal matter, manipulating wounds, taking medications to induce symptoms)
Management
Diagnosis
- Confirming the diagnosis often requires gathering records across institutions
- Avoid premature confrontation, which typically leads to elopement
- Multidisciplinary review essential
Communication
- Non-confrontational discussion that avoids accusations of "lying"
- Frame as a recognized condition with available help
- Direct confrontation often counterproductive
Treatment
- Few effective treatments; patients typically reject psychiatric care
- Psychotherapy if patient engages, addressing underlying psychological needs
- Treat comorbid mood, anxiety, or personality disorders
- Care coordination to prevent doctor-shopping and unnecessary procedures
For FDIA
- Child protection involvement is mandated and primary
- Separation of victim from perpetrator typically required
- Long-term mental health treatment for perpetrator if accepted
- Psychological treatment and monitoring for victims
Conclusion
Factitious Disorder is among psychiatry's most challenging conditions, sitting at the intersection of mental illness, deception, and medical harm. Recognition is the central clinical task — once identified, doctor-shopping can be prevented and unnecessary medical interventions stopped. The variant imposed on another is a form of child abuse and warrants child protection involvement regardless of the perpetrator's diagnostic status. Treatment is difficult but worth attempting; the alternative is years of harmful medical exposure for the patient or the dependent victim.