The expert’s task is not to make the claim more dramatic. It is to decide whether the diagnostic picture, chronology and functional effect support PTSD, or whether another explanation fits better, that work takes care.
The event is not the diagnosis.
A road traffic accident, workplace incident, assault, clinical event or other traumatic experience may be the starting point for a PTSD claim. It is not enough on its own.
This is one of the first mistakes I look for in medico-legal reports. The report describes the accident as frightening, records that the claimant has nightmares or avoids driving, and then moves too quickly to PTSD. That is not proper reasoning. A traumatic event can lead to multiple outcomes: Some people develop short-lived distress, travel anxiety, depression, panic symptoms or even a worsening of pre-existing mental health difficulties such as PTSD.
The diagnosis depends on the pattern of symptoms, not just the seriousness of the incident.
A careful report should identify the symptoms said to support PTSD. Re-experiencing symptoms matter. Avoidance matters. Hyperarousal matters. Negative changes in mood, cognition and functioning may matter. Sleep, concentration, irritability and startle response may all be relevant. But the expert should not simply list symptoms and assume the answer follows.
The key question is whether they form a coherent clinical picture.
Timing often decides the case.
The chronology of psychological symptoms is often more useful than the label attached to them.
When did symptoms begin? Were they recorded early? Did the claimant describe intrusive memories, nightmares or flashbacks shortly after the event? Was there avoidance of reminders? Did symptoms worsen over time? Were there GP consultations, counselling referrals, medication changes or occupational difficulties? Was there a previous psychiatric history?
These questions are not administrative. They are the core of the medico-legal assessment.
Early records are not perfect. A claimant in shock after an accident may not describe psychological symptoms fully. A GP record may focus on pain. Claimants do not seek help because they hope symptoms will settle or because they feel embarrassed. Silence in the notes is not always absence of symptoms however repeated absences matter.
If PTSD is first alleged months after the event, with no earlier reference to intrusive symptoms, avoidance or functional psychological impairment, the expert must address that gap. The answer may still support the claimant, but it cannot be assumed. In litigation, timing is often the difference between a persuasive psychiatric opinion and a fragile one.
PTSD is not travel anxiety with a longer name.
In road traffic claims, the most common error is confusing PTSD with travel anxiety.
A claimant may feel nervous in a car after a collision. They may avoid the accident location. They may prefer not to drive on motorways. They may sit tensely as a passenger or feel unsettled when another vehicle brakes suddenly. Those symptoms may be genuine and accident related.
They are not automatically PTSD.
Travel anxiety can be clinically significant. It may affect work, family life and independence. It may require treatment. It may be compensable. But it should be called what it is.
The label matters because PTSD carries a different clinical meaning, prognosis and treatment implication. Overdiagnosis helps nobody. It may inflate the claim in the short term, but it leaves the report exposed when evaluated. Underdiagnosis is equally unsafe. A claimant with intrusive recollections, avoidance, disturbed sleep, hypervigilance and marked functional impairment should not be reduced to “some nervousness when travelling” because the assessor did not ask enough questions.
The expert must separate ordinary fear, travel-specific anxiety, adjustment reaction and PTSD.
That distinction is not academic. It affects causation, treatment and valuation.
The calm claimant problem.
Claimants with PTSD present with obvious distress. Others do not.
A claimant may describe horrific symptoms in a flat, controlled manner. Another may minimise symptoms because they are ashamed and avoid emotion during examination precisely because avoidance is part of their coping pattern. Others become visibly distressed but do not meet diagnostic criteria for PTSD.
Appearance during interview is evidence, however it is not the whole evidence.
I am cautious about reports that place too much weight on whether the claimant looked traumatised. There is no reliable courtroom face of PTSD. Presentation must be considered alongside history, records, symptom pattern, function and consistency.
That said, observed presentation can still matter. If a claimant describes severe daily symptoms but shows no apparent distress, has maintained all normal activities and has no supporting record, that may require analysis. The point is not to ignore presentation. The point is to avoid using it crudely.
Psychiatric evidence is rarely safe when it depends on a single impression.
Pre-existing vulnerability must be analysed, not weaponised.
PTSD claims involve claimants with prior anxiety, depression, trauma, grief, stress or previous treatment.
Defendants often focus on that history. Sometimes they are right to do so. A pre-existing psychiatric condition may explain some or all of the current symptoms. It may affect prognosis. It may mean the accident aggravated rather than caused the condition. It may also show vulnerability. But vulnerability is not a defence by itself.
The defendant takes the claimant as found. A psychologically vulnerable claimant is not barred from recovery because someone else might have coped better. The medico-legal question is what changed because of the accident.
Was the claimant functioning before the event? Were symptoms active or historic? Was treatment ongoing? Did the accident produce a new symptom pattern? Did it worsen an existing condition? Would the claimant have deteriorated in any event? These are the questions the report must answer.
A prior mental health history should not be used as a blunt tool to defeat a claim. Nor should it be ignored because it complicates the claimant’s case. It belongs in the analysis.
Function is where the diagnosis becomes real.
In PTSD claims, function often tells the story more clearly than the diagnostic label.
Can the claimant travel? Can they work? Can they sleep? Can they attend appointments? Can they tolerate reminders of the event? Can they maintain relationships? Can they concentrate? Have they withdrawn socially? Are they avoiding ordinary activities?
A diagnosis without functional analysis is of limited use to the court.
This is particularly important where symptoms are persistent. A claimant may continue working but only with marked distress, reduced hours or avoidance of travel. Another may be off work entirely. Another may function well in most areas but remain unable to drive. These are the various levels of impairment.
The report should say so. It should also accept the claimant’s account against the wider evidence. GP records, therapy notes, occupational health material, employment records and witness evidence may support the account or raise questions. A claimant’s report of severe avoidance may be difficult to reconcile with frequent long-distance driving. Equally, a single journey does not disprove PTSD.
The issue is pattern, not snapshot.
Treatment and prognosis need more than optimism.
PTSD is treatable, but prognosis should not be guessed.
The report should identify what treatment has been received, whether it was trauma-focused, whether the claimant engaged with it and whether symptoms improved. If treatment has not occurred, the expert should consider why. Delay in treatment may prolong symptoms. Avoidance may itself be part of the condition. Access to treatment may also be an issue.
A medico-legal prognosis should not simply say that symptoms will resolve in six months. It should explain the basis for that view.
Is the claimant improving? Are symptoms entrenched? Is there comorbid depression, chronic pain, ongoing litigation stress or pre-existing trauma? Is further therapy recommended? Is medication relevant? Is there a risk of relapse? Does the claimant need psychiatric or psychological input?
The answer may be provisional. That is acceptable if the report says so.
False certainty is worse than honest caution.
The expert must stay in role.
Psychiatric experts are not there to make the claim more sympathetic. They are not there to protect defendants from difficult psychological injury claims. They are there to assist the court.
That means using diagnosis carefully, explaining causation, addressing contrary evidence and staying within expertise. It also means resisting pressure from either side to overstate or minimise symptoms.
The best PTSD reports are not dramatic. They are disciplined.
They identify the traumatic event, record the symptom chronology, distinguish PTSD from related conditions, analyse pre-existing vulnerability, assess function, consider treatment and explain prognosis. They state what is supported, what is uncertain and what cannot safely be concluded.
That is how psychological injury evidence earns weight.
PTSD is too serious to be used loosely and too important to be missed casually. The medico-legal system needs reports that recognise both risks.
The diagnosis should never be assumed because an accident was frightening.
It should never be dismissed because the injury is invisible.
It must be proved, clinically and evidentially, one careful step at a time.
