Why Headache History Is a High-Yield OSCE Station
Headache is one of the most common presentations in both GP and A&E settings and appears frequently in OSCE history stations. The examiner wants to see you systematically exclude dangerous causes — specifically subarachnoid haemorrhage — before exploring benign differentials. A candidate who confidently identifies red flags and acts on them will always outscore one who only knows the migraine criteria.
SOCRATES Applied to Headache
| Question | Discriminating follow-up | What it suggests |
|---|---|---|
| Site | Unilateral or bilateral? Frontal, occipital, orbital? | Migraine = unilateral; TTH = bilateral band; cluster = orbital |
| Onset | Sudden or gradual? Time to peak? | Thunderclap (seconds) = SAH; gradual = migraine/TTH |
| Character | Throbbing, pressure, stabbing, tearing? | Throbbing = migraine; pressure = TTH; excruciating = cluster |
| Radiation | Neck stiffness? Jaw claudication? | Neck = meningism; jaw = GCA |
| Associations | Nausea, vomiting, photophobia, phonophobia, aura? | Migraine triad: photophobia + phonophobia + nausea |
| Timing | How long? First ever or recurrent? | Episodic = migraine/cluster; constant = TTH/raised ICP |
| Exacerbating | Worse with movement, coughing, lying flat? | Raised ICP worse lying flat; migraine worse with movement |
| Severity | 0–10 | 10/10 at sudden onset = SAH until proven otherwise |
Red Flag Screening: SNOOP
🧠 Mnemonic
SNOOP — screen every headache for dangerous causes
S — Systemic illness: fever, weight loss, malignancy, HIV, immunosuppression
N — Neurological signs: focal deficits, confusion, papilloedema, neck stiffness
O — Onset: sudden thunderclap — worst headache of life, reaching maximum within 60 seconds
O — Older age: new-onset headache over 50 (giant cell arteritis, malignancy)
P — Progressive pattern: worsening over weeks, worse lying flat (raised ICP)
⚠️ Red Flag
Thunderclap headache — sudden onset reaching maximum severity within 60 seconds — is a subarachnoid haemorrhage until proven otherwise. Ask specifically: "Did the headache come on very suddenly — like a bang or explosion in your head?" A positive answer requires urgent CT head, and LP at 12 hours if CT is negative (xanthochromia).
Differentials and Discriminating Questions
Subarachnoid Haemorrhage
- Thunderclap onset, maximum in seconds, often described as "worst headache of my life"
- May have brief LOC, neck stiffness, photophobia, vomiting
- "Was there any warning before it hit? How quickly did it reach its worst?"
Migraine
- Unilateral, throbbing, moderate-severe, lasting 4–72 hours
- Associated with nausea/vomiting, photophobia, phonophobia
- Aura (if present): visual zigzag lines or scotoma preceding headache by 20–60 minutes
- Relieved by sleep; worsened by movement
- "Do you get any warning symptoms — flashing lights or blind spots — before the headache starts?"
Tension-Type Headache
- Bilateral, pressure or tightening ("band around the head"), mild-moderate
- Does not worsen with routine activity, no significant nausea, no aura
- Chronic: >15 days/month for >3 months
- Triggered by stress, poor posture, eye strain, analgesia overuse
Cluster Headache
- Severe, unilateral, periorbital/temporal pain lasting 15 minutes to 3 hours
- Autonomic features on the same side as pain: lacrimation, rhinorrhoea, ptosis, conjunctival injection
- Occurs in clusters (weeks to months) then remission
- More common in males (5:1)
- "During the headache, does your eye water or does your nose run — on the same side as the pain?"
Giant Cell Arteritis (age over 50)
⚠️ Red Flag
GCA causes permanent bilateral blindness if untreated. Ask about visual changes and jaw pain in any new-onset headache in a patient over 50. Start high-dose prednisolone before biopsy to protect vision.
- Temporal headache, scalp tenderness, jaw claudication (pain in jaw when chewing)
- Visual disturbance — amaurosis fugax → permanent vision loss
- Raised ESR and CRP, tender non-pulsatile temporal artery on examination
Raised Intracranial Pressure
- Progressive headache, worse in morning, worse lying flat, worse on coughing/Valsalva
- Associated nausea/vomiting, papilloedema on fundoscopy
- Causes: intracranial mass, cerebral venous sinus thrombosis, idiopathic intracranial hypertension
Completing the History
- DHx: analgesia use — medication overuse headache if simple analgesia used more than 10 days/month; OCP (thrombosis risk); triptans
- SHx: stress, sleep, caffeine, alcohol, screen time
- FHx: migraine (70% hereditary)
💡 Tip
Always ask about analgesia frequency. Medication overuse headache is the commonest cause of chronic daily headache and is often missed. The threshold is simple analgesia more than 10 days per month, or triptans more than 8 days per month.
ICE and Safety Netting
- ICE: "Many patients worry their headache could mean something serious — is there anything specific you're concerned about?"
- Safety net: "If you ever get a headache that comes on very suddenly and severely — unlike anything you've had before — please call 999 immediately."
Frequently Asked Questions
"What are the red flags in a headache history OSCE?"
The SNOOP mnemonic covers the key red flags: Systemic features (fever, weight loss), Neurological signs (focal deficit, confusion, papilloedema), sudden thunderclap Onset, Older age new-onset headache (over 50 — think GCA), and Progressive worsening pattern. Any of these warrants urgent investigation.
"How do I distinguish migraine from tension headache?"
Migraine is typically unilateral, throbbing, moderate-severe, with nausea and photophobia or phonophobia — it worsens with routine physical activity. Tension headache is bilateral, pressure-like (band around the head), mild-moderate, and does not worsen with movement or cause significant nausea. Migraine may also have an aura.
"What is thunderclap headache and why does it matter in an OSCE?"
A thunderclap headache reaches maximum severity within 60 seconds of onset. It is subarachnoid haemorrhage until proven otherwise — requiring urgent CT head (sensitive within 6 hours of onset), followed by lumbar puncture at 12 hours if CT is negative to look for xanthochromia. Always ask specifically: "How quickly did the headache reach its worst point?"
"What are the features of cluster headache I need to know?"
Cluster headache is severe, strictly unilateral periorbital pain lasting 15 minutes to 3 hours, occurring up to 8 times daily in clusters of weeks to months. The key discriminating feature is ipsilateral autonomic symptoms — lacrimation, rhinorrhoea, ptosis, and conjunctival injection on the same side as the pain. It is far more common in males.
"When should I worry about giant cell arteritis in a headache station?"
Any patient over 50 with a new headache should be asked about jaw claudication and visual disturbance. GCA causes granulomatous inflammation of medium and large vessels; the feared complication is irreversible blindness from ischaemic optic neuropathy. Start high-dose prednisolone empirically before temporal artery biopsy — do not wait for biopsy results to begin treatment.
Related guides: [Neurological History OSCE](/blog/neurological-history-osce) · [Neurological Examination OSCE](/blog/neurological-examination-osce) · [How to Take a Cardiology History OSCE](/blog/how-to-take-a-cardiology-history-osce)