Headache diagnosis and causation evidence
Can I make a CTP claim for headaches or migraines after an accident?
Headaches can form part of a claim, but the cause must be assessed
Yes. Headaches or migraine-like symptoms can be relevant to a NSW CTP claim when medical evidence connects them to the motor accident. The symptom label alone does not identify the injury. A clinician may need to consider concussion, a cervical injury, medication effects, sleep disturbance, a primary headache disorder and other causes. Treatment entitlement, threshold injury classification and whole person impairment are separate questions.
A claimant may describe pressure, throbbing pain, light or noise sensitivity, nausea, visual disturbance, neck-related headache or a change in a pre-existing migraine pattern. The clinical record should identify the character, frequency, duration, associated symptoms and functional effect rather than use “headache” as a complete diagnosis.
Urgent assessment is important for a sudden severe headache, worsening neurological symptoms, repeated vomiting, weakness, confusion, seizure, loss of consciousness or another red-flag feature. A CTP claim should never be used as a substitute for emergency medical care.
Reviewed by Herman Chan, Stephen Young Lawyers
What can cause headaches after a motor accident?
A direct head impact, rapid acceleration and deceleration, neck injury, altered sleep, psychological symptoms or medication can each be relevant. More than one factor may operate at the same time. A treating practitioner should record the accident mechanism, any head strike or altered consciousness, neck symptoms, neurological features and the timing of the first headache.
A person with pre-existing migraine can still have an accident-related change. The useful comparison is the pattern before and after the crash: frequency, severity, triggers, medication, time off work and need for treatment. The accident is not automatically the cause of every later episode, so the report should address the change and other plausible explanations.
What examination and investigation evidence matters?
GP, emergency and specialist records may document neurological examination, cervical findings, vision, balance, cognition and red flags. Imaging can be important where clinically indicated, but a normal scan does not by itself disprove headache symptoms and an abnormal scan does not by itself prove accident causation.
A headache diary can record frequency, duration, medication, triggers and functional interruption. It is more useful when maintained contemporaneously and reviewed by the treating practitioner. Neuropsychological testing, neurology review, ophthalmology, vestibular assessment or cervical investigation may be appropriate only where the clinical presentation supports them.
How are headaches treated for threshold injury and WPI?
A symptom is not itself a threshold classification. The insurer or medical assessor considers the diagnosed injury under the current statutory definition and Motor Accident Guidelines. For example, headache associated with a soft-tissue neck injury may remain part of a threshold injury unless separate evidence establishes a different qualifying injury.
Headaches also do not automatically produce a WPI percentage. Permanent impairment is assessed using the adopted method for the diagnosed body-system injury when the condition is sufficiently stable. Pain is generally accounted for within the relevant impairment method; the AMA4 pain chapter is not used as a separate CTP impairment allowance.
Practical next steps
What should I do if headaches develop after the crash?
Obtain clinical assessment and create a reliable record of onset, pattern and function.
Seek medical assessment
Describe the accident, any head strike or altered consciousness, neck symptoms, first headache and red-flag symptoms accurately.
Keep a practical headache diary
Record episodes, duration, associated symptoms, medication and the activity or work interrupted without exaggerating every fluctuation.
Provide the pre-accident history
Tell the practitioner about prior migraine, headache treatment, imaging and medication so any accident-related change can be assessed.
Ask for a reasoned treatment request
The request should identify the working diagnosis, clinical basis, proposed treatment, goals and relationship to the accident.
Obtain the insurer decision in writing
If treatment or causation is disputed, request the reasons, evidence relied on and available review process.
Evidence
Headache and migraine evidence checklist
The evidence should connect the symptom pattern to a clinically supported diagnosis and functional effect.
- Ambulance, emergency and early GP notes recording head, neck and neurological symptoms.
- A contemporaneous headache diary with frequency, duration, medication and functional interruption.
- Neurological and cervical examination findings and any red-flag assessment.
- Relevant imaging or investigations with a clinical explanation of what they do and do not show.
- Pre-accident migraine or headache records, prescriptions and treatment history.
- Neurologist, rehabilitation physician or other specialist opinion where clinically indicated.
- Certificate of fitness and employer records if headaches affect work capacity.
- A treatment plan identifying diagnosis, goals, review points and response to treatment.
What does not prove the claim by itself?
- A headache diary records symptoms but does not diagnose their cause.
- A normal scan does not decide the claim, and an imaging finding does not establish causation without clinical correlation.
- The word “migraine” in a claim form is not a substitute for a medical diagnosis and history.
- A headache does not automatically establish concussion, non-threshold injury or permanent impairment.
- Do not stop or change medication solely for claim purposes; discuss treatment with the prescribing practitioner.
Timing
Claim and dispute timing
Protect the claim while the diagnosis and treatment plan are being developed.
- The general period for lodging a statutory personal injury benefits claim is three months after the accident.
- Lodgement within 28 days is significant if weekly payments are sought from the day after the accident; a later claim requires an explanation and may affect backdating.
- Police reporting is generally required within 28 days unless police attended. Keep the event number and accurate symptom chronology.
- A treatment refusal or causation decision should be checked promptly for its internal-review and PIC rights. The triggering decision and dispute type determine the procedure.
Frequently asked questions
- Can I claim if the headache started several days later?
- Potentially. The delay should be explained through the accident history, symptom chronology, early records, examination and medical opinion rather than treated as an automatic exclusion.
- Does a normal CT or MRI defeat the claim?
- No automatic rule applies. Imaging is one part of the evidence. Some headache conditions do not produce a structural scan finding, while an incidental finding may be unrelated.
- Can a pre-existing migraine condition be included?
- The claim can address an accident-related aggravation if supported by evidence. Compare the documented pre-accident and post-accident pattern and avoid attributing every later episode without analysis.
- Will headaches increase my WPI?
- Not automatically. WPI depends on the diagnosed permanent impairment and the method adopted by the Motor Accident Guidelines. Symptoms alone do not create a separate percentage.
- Can the insurer require an independent examination?
- An insurer may arrange an examination within the scheme. Check the purpose, questions, appointment details and records to be considered, and continue appropriate treating care.
- What if headache medication affects my work?
- Tell the treating practitioner. Records should distinguish the underlying injury, medication effects and functional restrictions so capacity can be assessed on accurate evidence.
Related NSW CTP guides
Official sources
- Motor Accident Injuries Act 2017 (NSW), current in-force version
- SIRA Motor Accident Guidelines, current published version
- SIRA guide for people injured in motor accidents in NSW
- Service NSW: apply for personal injury benefits after a motor vehicle accident
The legislation and SIRA material linked above are the public-source basis for this page. Medical and legal conclusions depend on the accident date, the current law, the insurer decision and the evidence in the individual claim.
Medical evidence and insurer reasons
Has the insurer disputed your accident-related headaches?
Send the decision, headache chronology and relevant medical reports. We can identify whether the dispute concerns causation, treatment, work capacity, threshold injury or WPI.
General information only: This page is about the NSW motor accidents scheme and is not legal or medical advice. It does not promise claim acceptance, treatment approval, weekly payments or damages. Urgent symptoms require prompt advice from an appropriate health practitioner.