When hospitalized patients present with unexplained or inconsistent symptoms, clinicians should maintain a heightened level of clinical suspicion for factitious disorder when objective data repeatedly fail to corroborate the reported illness and the course is atypical. The American Psychiatric Association in DSM-5 defines factitious disorder as falsification of signs or symptoms to assume the sick role, distinguishing it from conditions driven by external incentives. The World Health Organization in ICD-11 similarly separates factitious presentations from malingering, which involves clear external gain.
Clinical clues
Warning signs include marked discrepancy between reported symptoms and objective findings, numerous invasive procedures or consultations without diagnostic confirmation, and a history of frequent hospitalizations across institutions. Patients who display unusual medical knowledge, whose symptoms appear primarily when alone or under particular caregivers, or who have evidence of tampering with tests or wounds warrant closer evaluation. Such patterns do not prove intent, but they increase the likelihood that symptoms are being produced or feigned. Historical descriptions by Richard Asher Royal Free Hospital emphasized dramatic, attention-seeking presentations that persist despite exhaustive negative workups, and contemporary guidance recommends careful documentation and early psychiatric involvement.
Causes and consequences
Etiology is complex and multifactorial; factitious behaviors often co-occur with personality disorders, unresolved trauma, or unmet psychosocial needs and may be reinforced by healthcare attention. Motivation is primarily internal rather than external, which contrasts with malingering. Consequences for the patient include risk of iatrogenic injury from unnecessary interventions and missed appropriate treatment, while hospitals face increased resource use, diagnostic delay, and strained therapeutic relationships. Cultural and territorial factors shape presentation and detection: stigma around mental illness, variable access to psychiatric services, and differing medico-legal environments influence whether patients seek repeated care and how clinicians interpret symptom credibility.
When encountering suspicious patterns, clinicians should pursue a balanced approach: gather corroborating data, involve consultation-liaison psychiatry early, and adopt a nonconfrontational stance that prioritizes safety and continuity of care. Professional guidance from organizations such as the Royal College of Psychiatrists supports multidisciplinary management that minimizes harm while addressing underlying psychiatric needs.