Establish the Headache Pattern.
The first question is what the person means by headache. Location, frequency, duration, severity, triggers, and associated symptoms can all help define the pattern. Nausea, light sensitivity, dizziness, visual disturbance, neck pain, or concentration problems may provide further context.
The expert should also establish when the headaches first appeared after the accident. Immediate onset may support one explanation, while delayed onset may require broader consideration. However, timing alone cannot establish causation.
Changes over time matter just as much as the first presentation. Improving headaches suggest a different recovery pattern from symptoms that remain static or progressively worsen. A fluctuating pattern may also reflect sleep, stress, activity, treatment response, or another medical condition.
Consider Head Injury and Neck Injury Separately.
Headaches after a collision may follow several mechanisms, and each mechanism needs separate analysis. A direct head impact may support a post-traumatic explanation, particularly when other concussion symptoms occurred.
However, headaches can also arise after neck injury without direct head trauma. Cervical pain, restricted movement, and muscle tenderness may contribute to a different clinical picture. The report should explain which features support each mechanism.
Normal imaging does not automatically resolve the question because many headache disorders remain clinical diagnoses. Equally, an accident history should not override findings that suggest another explanation.
Where neurological features appear, the expert should consider whether the case needs further assessment. Progressive weakness, new focal symptoms, seizures, or significant deterioration may justify specialist investigation.
The Pre-Accident History Matters.
A previous headache history can materially change the causation analysis. Some people experienced migraine, tension-type headaches, or intermittent headaches long before the accident.
The expert should establish the earlier frequency, severity, treatment, and effect on daily life. The key question is whether the accident created something new or changed an existing pattern.
A pre-existing condition does not exclude accident-related aggravation. The accident may increase frequency, severity, duration, or treatment requirements without causing an entirely new disorder.
Records can help test that distinction, although the expert should interpret silence carefully. Earlier headaches may never appear in medical notes if they were mild or self-managed.
Treatment Can Clarify the Clinical Picture.
Treatment history can provide useful evidence about severity, persistence, and response. Analgesics, migraine treatment, physiotherapy, or specialist review may all form part of the picture.
The expert should ask which medication the person used, how often they used it, and whether it helped. A prescription alone does not prove regular use, while repeated medication may create additional clinical questions.
Frequent analgesic use can sometimes contribute to continuing headache patterns. The expert should consider that possibility when the treatment history and symptom pattern make it relevant.
Poor treatment response may also justify reassessment rather than automatic escalation. The original diagnosis may need review when symptoms change or fail to follow the expected pattern.
Function Often Shows the Real Impact.
A headache diagnosis says little about disability unless the report explains its functional consequences. The expert should explore work, driving, sleep, concentration, exercise, household activity, and social participation.
Someone may experience frequent headaches while maintaining most normal activities. Another person may need regular breaks, reduced hours, or avoidance of specific tasks.
These differences matter because symptom frequency does not always match functional loss. The report should therefore separate headache severity from the practical restriction it creates.
Consistency also needs context. A person may attend work despite headaches but struggle afterwards with fatigue or reduced concentration. One successful activity should not automatically establish normal sustained capacity.
Causation Needs More Than Chronology.
Headaches beginning after an accident may relate to it, but sequence alone does not prove the connection. The expert should consider mechanism, clinical pattern, records, examination findings, and alternative causes.
Sleep disturbance, stress, pre-existing migraine, medication effects, visual problems, or unrelated illness may all influence symptoms. The presence of alternatives does not automatically defeat causation.
Instead, the report should explain which explanation best fits the evidence. In some cases, the accident may cause a new headache disorder. In others, it may temporarily or permanently aggravate an existing condition.
Where evidence remains incomplete, a qualified opinion may prove more defensible than false precision.
Prognosis Should Follow the Evidence.
Prognosis should reflect the headache pattern, duration, treatment response, function, and any associated injuries. A standard recovery period should not replace individual analysis.
Improvement over time may support a favourable outlook, even when some symptoms continue. Persistent or worsening headaches may require greater caution and possibly further investigation.
The expert should also distinguish symptom resolution from functional recovery. Someone may continue experiencing occasional headaches while returning to normal work and activity.
A strong report explains what the headaches represent, why the accident matters, and what remains uncertain. It should also identify whether further assessment could materially change the opinion.
The central task is not simply to record that headaches followed the collision. It is to explain their pattern, cause, functional effect, and expected recovery.
