Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Assess persistent physical symptoms respectfully, recognise positive functional diagnoses where appropriate and coordinate care that reduces disability and unnecessary harm while remaining alert to new disease.
Patients may remain troubled by pain, fatigue, dizziness, weakness, breathlessness or episodic symptoms after hospital investigations have excluded some suspected diseases. The term medically unexplained describes the state of an assessment rather than a single mechanism or psychiatric diagnosis. It should not imply that the symptom is invented, that no treatment can help or that future physical disease is impossible. A useful formulation states what is known, what has been reasonably excluded and what clinical process may account for the current symptoms.
Some presentations support a positive functional diagnosis. In functional neurological disorder, examination or event characteristics may demonstrate altered control of movement, sensation or awareness. Examples include a reproducible difference between voluntary and automatic movement or an entrainable tremor, interpreted in the full neurological context. Expertise matters: pain, misunderstanding and other neurological illness can complicate individual signs. Do not announce a diagnosis solely because imaging is normal or because distress preceded symptom onset.
Persistent physical symptoms may follow illness, injury or distress and be influenced by sleep, pain and treatment effects, with no single causal pathway applying universally.
Some neurological symptoms reflect altered movement, sensation or awareness processes supported by positive clinical features, sometimes alongside established structural or other physical disease.
Attention, expectations and perceived threat can influence how bodily signals are experienced and acted upon without the person deliberately producing or controlling symptoms.
Functional motor symptoms can show differences between automatic and deliberately attended movement, providing clinical information about altered control rather than demonstrating dishonesty.
Pain, poor sleep, avoidance, deconditioning and repeated frightening healthcare experiences may reinforce disability, suggesting several potential treatment targets rather than one assumed psychological cause.
The person may have substantial functional limitation despite reassuring structural tests; assess the practical impact instead of inferring severity from imaging.
Consistent examination or event features may support a functional neurological diagnosis when evaluated by clinicians with suitable neurological expertise.
Repeated normal results may fail to address the patient's feared explanation, especially when no alternative account or management plan has been offered.
A patient can have established neurological or medical disease and additional functional symptoms, so assessment should avoid forcing an either-or conclusion.
A partially investigated or evolving condition may remain undetected, so new objective findings, changed symptoms or a revised history should reopen the relevant diagnostic question.
Adverse effects, withdrawal or interactions can produce dizziness, fatigue, pain and cognitive complaints, particularly when symptom treatment has become complex or progressively intensified.
These disorders can increase bodily distress and impairment, but require their own clinical assessment and do not make the physical symptoms unreal or fully explained.
A previous functional label may lead clinicians to miss a new disease if they stop examining changed symptoms or treat all future presentations as equivalent.
Unfocused repeated tests and procedures may create incidental findings, procedural complications and escalating uncertainty without addressing the patient's function or understanding.
Loss of activity, work, confidence and supportive relationships can persist when the patient receives neither a credible explanation nor a coordinated rehabilitation plan.
A reassuring investigation can reduce the likelihood of the disease it assesses without explaining the whole symptom experience or proving a psychiatric cause.
Demonstrating preserved automatic movement can support a hopeful account of potential recovery when done respectfully, rather than implying the person could move normally if they tried harder.
Therapy can help distress, symptom responses or comorbid conditions without implying that physical symptoms are imagined or require a traumatic cause.
A shared formulation allows appropriate reassessment of genuine change while reducing the pressure to restart the entire diagnostic process at every attendance.
Telling a patient that nothing is wrong after normal tests when they remain disabled and have not received an explanation or treatment plan.
Diagnosing functional neurological disorder solely from anxiety, an unusual presentation or a normal scan without positive clinical evidence.
Assuming a functional symptom excludes coexisting epilepsy, inflammatory disease or another physical diagnosis.
Using expressions of distress as evidence of fabrication or demanding that a patient disclose trauma before accepting the symptoms.
Repeating invasive investigations to provide temporary reassurance without reviewing the diagnostic question, potential harms and previous results.
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A neurology assessment finds reproducible positive signs supporting functional limb weakness, and relevant imaging is reassuring. The patient fears the diagnosis means the symptoms are fabricated. Which explanation is most appropriate?
National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 7 Sept 2026; clinical approval remains outstanding.
Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes
Investigations should answer explicit clinical questions. Review original reports and the circumstances of testing so that a normal test is not overinterpreted. A test may exclude one structural cause without proving a particular functional mechanism. Repeating the same investigation without a changed question can generate incidental findings, radiation, procedural risk and further uncertainty. Conversely, a genuinely new neurological sign or systemic red flag requires reconsideration rather than automatic reuse of the previous explanation.
Explanation is part of treatment. Describe symptoms as involuntary and discuss the findings supporting the working diagnosis in language the person can understand. Link treatment to achievable aims, such as walking to the bathroom, returning to a regular sleep pattern or managing episodes more safely. Physiotherapy, occupational therapy, symptom-specific medical treatment and psychological interventions may all have roles. Coordinate these around the patient's priorities, and make clear which team will continue reviewing the plan.