22 yr old with headache

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I now have sufficient content for a comprehensive answer. Here is the approach to management:

Approach to Headache in a 22-Year-Old

Step 1 — Immediate Priority: Exclude Life-Threatening Causes

The first task is always to rule out the following emergent diagnoses before treating symptomatically:

Diagnosis	Key Clue
Subarachnoid hemorrhage (SAH)	Thunderclap onset ("worst headache of life"), reaching peak in seconds
Meningitis / Encephalitis	Fever, neck stiffness, photophobia, altered mental status
Intracranial hemorrhage (ICH)	Sudden severe headache ± focal neuro deficit
Cerebral venous sinus thrombosis	Women on OCP, peripartum, hypercoagulable states
Carbon monoxide poisoning	Multiple household members affected, wintertime, enclosed space
Increased intracranial pressure	Positional worsening, papilledema, early morning headache with vomiting

At 22, temporal arteritis and glaucoma are not on the differential; meningitis and CVT are more relevant in this age group.

Step 2 — Focused History (Most Important Tool)

Onset: Instantaneous/thunderclap → investigate for SAH regardless of exam. Gradual → suggests tension or migraine.
Pattern: First-ever vs. recurrent. A change in the character of a known headache disorder warrants re-evaluation.
Associated features:
- Fever + neck stiffness → meningitis (LP is mandatory)
- Nausea/vomiting = nonspecific; present in migraine, raised ICP, glaucoma, CO poisoning
- Photophobia/phonophobia → migraine, meningitis
- Visual aura, unilateral throbbing → migraine
- Frontal pressure, band-like → tension
Triggers: Stress, sleep deprivation, menstrual cycle, skipped meals, screen time
Medication use: >10–15 days/month of any analgesic → consider medication-overuse headache
Social history: College dorm/barracks (meningitis risk); OCP use (CVT risk); prior similar episodes

Step 3 — Focused Physical Examination

Area	What to Check
Mental status	Alertness, orientation, confusion → SAH, meningitis, CO
Vital signs	Fever (infection), hypertension + bradycardia (↑ICP / Cushing's)
Fundoscopy	Papilledema (↑ICP), subhyaloid hemorrhage (SAH)
Meningeal signs	Kernig's, Brudzinski's → bacterial meningitis
Neurological exam	Cranial nerves (esp. II, III, IV, VI), motor/sensory — any deficit expands the differential and warrants imaging

Step 4 — Ancillary Testing (Targeted, Not Routine)

Most patients do not require imaging. Indications:

Non-contrast head CT (within 6 hours of onset): First-line for suspected SAH — sensitivity approaches 100% within 6 hours with a third-generation scanner
LP: If CT is negative but SAH still suspected (outside 6-hour window), or if meningitis is suspected. Check opening pressure, cell count, protein, glucose, xanthochromia
CT angiography (CTA): If CT negative and clinical suspicion for SAH remains high
MRI + MRV: Cerebral venous sinus thrombosis (better than CT), posterior circulation disease
CBC: If anemia or infection suspected

A head CT is not indicated for first presentation of typical tension-type or migraine headache with a normal exam.

Step 5 — Treatment

Primary headaches (after excluding secondary causes):

Mild to moderate (tension/non-specific):

NSAIDs (ibuprofen, naproxen) — first line
Paracetamol (acetaminophen) — alternative

Migraine (moderate to severe):

Oral: NSAID + antiemetic (metoclopramide or prochlorperazine) — also abortive
Parenteral (ED setting): Dopamine antagonists (metoclopramide 10 mg IV or prochlorperazine 10 mg IV) — highly effective
Triptans (sumatriptan, zolmitriptan) — migraine-specific, first-line oral option
Ketorolac IV/IM — effective adjunct
Opioids: NOT indicated for primary headache

Prophylaxis (if ≥4 headache days/month):

Propranolol, topiramate, amitriptyline, or candesartan — depending on comorbidities

Summary Algorithm

22-yr-old with headache
        │
        ├── Thunderclap / first & worst → Ottawa SAH Rule → CT head → LP/CTA if CT negative
        │
        ├── Fever + neck stiffness → Blood cultures → Antibiotics NOW → LP
        │
        ├── Focal neuro deficit / papilledema → Urgent CT head
        │
        └── Recurrent / typical pattern + normal exam
                    │
                    ├── Migraine features → Triptan / NSAID / antiemetic
                    └── Tension features → NSAID / paracetamol

Sources: Rosen's Emergency Medicine, 10th ed., Ch. 16 (Headache); Harrison's Principles of Internal Medicine, 22nd ed. (2025), Ch. 17

Electolyte issues or sleep issue?

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Great sources. Here's a focused breakdown:

Electrolyte Issues vs. Sleep Issues as Cause of Headache in a 22-Year-Old

Electrolyte Disturbances

Can they cause headache? Yes — but context matters.

The relevant electrolyte culprits are:

Electrolyte Abnormality	Mechanism	Headache Features
Hyponatremia	Cerebral edema from osmotic shift	Headache is an early symptom; progresses to lethargy → confusion → seizures as Na⁺ falls further
Hypercalcemia	Neurological effects	Headache + confusion, irritability, nausea/vomiting, fatigue, polyuria
Dehydration (Na⁺/fluid loss)	Reduced CSF pressure, intracranial vessel dilation	Positional, worse upright; a recognised migraine trigger
Hypomagnesaemia	Altered neuronal excitability	Implicated in migraine susceptibility; Mg²⁺ deficiency lowers seizure and headache threshold

Key point for a 22-year-old: Severe electrolyte disturbance causing headache in isolation is uncommon unless there's a clear precipitant — e.g., vomiting/diarrhoea, intense exercise with hypotonic fluid intake, eating disorder, diuretic use, or Addison's disease.

Ask specifically:

Recent vomiting, diarrhoea, or profuse sweating?
Inadequate oral intake or unusual diet?
Any medications (diuretics, SSRIs — which cause SIADH)?
Symptoms beyond headache: muscle cramps, fatigue, confusion, excessive thirst?

If electrolyte cause is suspected: Check BMP/U&E (Na⁺, K⁺, Ca²⁺, Mg²⁺, glucose, urea, creatinine).

Sleep Deprivation

A very common cause of headache at this age — and a major migraine trigger.

Sleep deprivation is explicitly listed in the differential for recurrent/chronic headache in young people, alongside tension headache, migraine, and caffeine withdrawal. — Harriet Lane Handbook, 23rd ed.

Common precipitants of migraine (and tension headache) include sleep deprivation, stress, hunger, hormonal changes, caffeine, certain foods, and sensory stimuli. — Rosen's Emergency Medicine, 10th ed.

Clinical pattern suggesting sleep-related headache:

Headache worse on weekends or after disrupted nights (common in students/shift workers)
Improves after sleeping (tension/migraine)
Worse in the morning → also consider obstructive sleep apnoea (OSA) — though OSA at 22 is less common unless obese
Associated with stress, academic pressure, screen time at night
Relieved by regular sleep schedule + caffeine (but watch for caffeine-withdrawal rebound)

Ask specifically:

Average hours of sleep per night? Consistent schedule?
Night shifts, late-night studying, gaming?
Snoring, waking unrefreshed, daytime somnolence? (→ consider OSA even at 22 if BMI elevated)
Does a good night's sleep resolve the headache?

Comparing the Two in a 22-Year-Old

Feature	Electrolyte Cause	Sleep-Related Cause
Likelihood	Lower (needs precipitant)	High (very common at this age)
Associated symptoms	Cramps, weakness, confusion, GI symptoms	Fatigue, difficulty concentrating, mood changes
Headache timing	Can be acute or subacute	Typically morning or after a bad night
Workup needed	BMP if clinically suspected	Usually history alone is sufficient
Treatment	Correct underlying electrolyte	Sleep hygiene, regular schedule, address triggers

Bottom Line

Sleep deprivation is far more likely in a 22-year-old with headache and should be the first question asked. Electrolyte disturbance is a secondary consideration and should only be investigated if there's a clinical reason (vomiting, poor intake, medications, or headache with systemic features like confusion or cramps).

If both are possible, a simple BMP costs little and rules out a treatable metabolic cause quickly — but don't image or over-investigate until sleep history and basic triggers are explored first.

Sources: Harriet Lane Handbook, 23rd ed.; Rosen's Emergency Medicine, 10th ed.; Brenner & Rector's The Kidney; The Washington Manual of Medical Therapeutics

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