MRCP Neurology: Mastering Acute Headache Guidelines for Exam Success

Why acute headache is high‑yield for MRCP

• Acute headache is a frequent acute neurology presentation in both the written and PACES stations.

• MRCP expects you to differentiate benign from life‑threatening causes rapidly and initiate the correct immediate pathway.

• Classic traps include missing subarachnoid haemorrhage (SAH), giant cell arteritis (GCA), and raised intracranial pressure (ICP).

A practical rule‑in / rule‑out approach (NICE/UK‑based, exam‑friendly)

Red flags: rule‑out “don’t miss” causes first

• Thunderclap onset (worst ever headache), exertional onset, or sudden change in headache pattern → Consider SAH.

• Focal neurology, reduced consciousness, seizures, papilloedema → Raised ICP/space‑occupying lesion.

• Fever + neck stiffness + photophobia → Meningitis/encephalitis.

• Jaw claudication, scalp tenderness, visual symptoms, ESR >50 → Giant cell arteritis.

• Headache in pregnancy/post‑partum, particularly with hypertension or neurological signs → Consider pre‑eclampsia/RVT.

• New headache in immunocompromised, HIV, anticoagulation, or known malignancy → Think infections, venous sinus thrombosis, or bleed.

Pattern recognition for quick differentials

• Sudden “worst ever” → SAH until proven otherwise.

• Posterior, thunderclap with negative CT → Lumbar puncture (LP) for xanthochromia.

• Progressive morning headache with vomiting/worse on cough/lying flat → Raised ICP.

• Bilateral temporal pain with visual symptoms → GCA—urgent ESR/CRP and steroids.

• Meningitic features → Immediate antibiotics; consider imaging first if focal signs.

Quick bedside tools

• ABCDE and glucose check; assess for meningism and focal neurology.

• Fundoscopy for papilloedema.

• Visual fields and temporal arteries in older patients.

Immediate management pathways (NICE aligned)

Suspected SAH

• Urgent non‑contrast CT head (sensitivity near 100% within 6 hours). If CT negative and suspicion persists, perform LP >12 hours after onset to detect xanthochromia.

• If SAH confirmed, expedite neurosurgical referral; avoid analgesia‑induced masking—provide adequate pain control.

Suspected meningitis/encephalitis

• Do not delay antibiotics in meningism—give IV antibiotics promptly. If focal neurology, seizures, or papilledema, image before LP.

• Consider acyclovir if viral encephalitis is plausible.

Suspected GCA

• Do not await ESR/CRP if classic features—start high‑dose oral steroids immediately and arrange urgent temporal artery biopsy.

• Warn patient about visual loss risk; document steroid plan and follow‑up.

Raised ICP/space‑occupying lesion

• Immediate neuro‑imaging (MRI/CT). Stabilize and involve neurosurgery early.

• Control pain/vomiting; avoid valsalva‑worsening factors.

Primary headache disorders (after exclusion of red flags)

• Migraine: triptans (if no contraindications), anti‑emetics, rest in dark room.

• Tension‑type: analgesia, lifestyle measures.

• Medication‑overuse headache: reduce/stop regular analgesics and start preventive therapy if indicated.

MRCP exam structure: what to demonstrate

• Triage accuracy: Spot red flags immediately; explain “why” and “what next”.

• Risk communication: Clear, concise wording in a simulated patient encounter.

• Safe prescribing: Check interactions/contraindications (e.g., triptans in ischemic heart disease).

• Documentation: Time‑stamped decisions, investigations requested, and escalation.

Common pitfalls to avoid

• Missing SAH because the patient looks “okay” after analgesia.

• Imaging too late in GCA—vision loss is often irreversible.

• Performing LP without imaging in someone with papilloedema or focal deficits.

• Treating as migraine before excluding SAH/meningitis.

High‑yield quick checklist for PACES

• ABCDE + glucose.

• Red flags (SNOOPP‑t): Sudden, Neurological, Onset/exertional, Older age, Progressive, Papilloedema, Positional.

• Fundoscopy for papilloedema; look for temporal artery tenderness.

• If red flag present: state “I would arrange urgent imaging/lumbar puncture/urgent bloods (ESR/CRP) and escalate.”

Best study resources

• NICE CKS and NG guidelines on headache (including red flags, SAH, GCA).

• UpToDate tables for headache differentials and initial imaging rules.

• Oxford Handbook of Neurology—acute neurology and headache pathways.

• Pastest/MCQ banks for neurology—practice timed triage questions.

• PACES stations—role‑play with time pressure to practice risk communication.

A concise PACES blueprint

1. Identify red flags within 30 seconds.

2. State exclusion plan: “Urgent CT ± LP; check ESR/CRP; consider antibiotics.”

3. Explain to the patient: next steps, risks, and what to expect.

4. Document and escalate appropriately.

Master the triage. Show you can spot danger fast. That’s what MRCP rewards.