Migraine: Causes, Assessment & Nursing Guide

📖Definition

Migraine is a recurrent headache disorder that often produces moderate-to-severe throbbing or pulsatile head pain, typically worsened by routine activity, with nausea and/or photophobia and phonophobia; some patients experience reversible aura before or during the headache phase. At the bedside, nurses document attack pattern, disability, aura timing, and deviation from the patient’s baseline—not a formal diagnosis unless recorded by the care team.

Migraine attacks may be associated with triggers such as sleep disruption, hormonal fluctuation, stress, or dietary factors in individual patients; the same presentation can also overlap with secondary causes when red flags appear—clinical correlation and clinician judgment guide next steps.

Distinguish “typical migraine day” from “this is different” using the patient’s own history; objective neuro observation still matters when aura is atypical or prolonged.

🧩Common Causes of Migraine

The categories below describe patterns nurses often see alongside migraine-like attacks. Each may be associated with migraine presentations or mimics; diagnosis and classification belong to clinicians—not the bedside.

• Primary migraine disorder: Recurrent attacks with typical features (often unilateral throbbing pain, sensory sensitivity, nausea) may match a known pattern when compared with prior episodes—document change from baseline carefully.
• Broader headache context: Compare today’s attack with other headache types the patient has experienced; tension-type and migraine features overlap, and clinicians integrate history and exam.
• Condition-level overview: The migraine condition page summarizes diagnosis and management themes; nursing aligns care with the active plan and orders.
• Aura and visual symptoms: Reversible visual or sensory changes may precede headache; blurred vision or field defects that persist or worsen need urgent review—not routine aura.
• Cerebrovascular mimics: Stroke or TIA may present with sudden headache plus focal signs; posterior circulation events can pair headache with vertigo or ataxia—follow stroke screening tools used in your facility.
• Infectious and meningeal mimics: Meningitis and other CNS infections may be associated with headache, fever, and altered mental status—escalate when meningeal features or sepsis signs appear.

🏥Presentation Patterns

ED / urgent care

• Severe migraine attack with incapacitating pain, repeated vomiting, and dehydration—may need IV fluids and antiemetics per order
• Thunderclap headache, new focal deficits, or atypical aura—stroke, hemorrhage, and arterial dissection may be in the differential until evaluated
• First presentation of migraine with aura in adulthood or aura without headache clearing—often escalated for clinician risk stratification

General ward / medical–surgical

• Post-operative patients with history of migraine may trigger with opioids, sleep disruption, or dehydration—compare to prior pattern
• Inpatients with cancer or immunocompromise reporting new headache plus focal signs—often prompt urgent review even if migraine history exists

ICU

• Sedation may mask patient-reported migraine; blood pressure swings, vasospasm context, or neurosurgical history influence assessment
• Patients weaning sedation may describe returning head pain—distinguish expected discomfort from red-flag features

Outpatient / primary care

• Episodic attacks with predictable prodrome or postdrome (fatigue, mood change) may be managed with individualized plans—safety-net when features change
• Chronic migraine with high-frequency days may overlap with medication-overuse patterns—document analgesic frequency for the prescriber

👁️What Nurses Observe

• Preference for dark, quiet environment; photophobia and phonophobia may be obvious before pain score is obtained
• Unilateral or bilateral throbbing pain; patient may pace or remain motionless depending on phase
• Nausea, vomiting, diaphoresis, or pallor—autonomic features common in moderate-to-severe attacks
• Preheadache irritability, yawning, food craving, or neck tightness when patients report prodrome
• Transient visual shimmering, scotoma, or sensory symptoms during aura—note start and resolution times
• Residual fatigue, “washed out” feeling, or scalp tenderness in postdrome—may affect mobility and cognition

🧠Bedside Interpretation

Connect observed patterns to possible mechanisms without labeling a definitive diagnosis—tempo, triggers, and associated signs drive escalation.

🔎Subtle Cues

• “Not my usual migraine” language from a patient who normally self-manages at home—baseline comparison matters
• Mild neck stiffness dismissed as “slept wrong” while fever is trending up
• Subtle word-finding or visual field complaint before obvious weakness—early posterior circulation or cortical symptoms
• Using more OTC analgesics than usual without relief—may signal medication-overuse or evolving secondary cause
• Behavioral change or agitation in older adults who cannot articulate pain—may be the only clue to headache or intracranial process

⚖️Sorting urgent versus non-urgent presentations

👥Patient Population Differences

Older adults

• New headache after age 50, especially with jaw claudication or visual symptoms, may prompt urgent evaluation for giant cell arteritis—follow local pathways
• May under-report pain but show reduced appetite, confusion, or reduced mobility—compare to baseline; polypharmacy complicates analgesic choice

Pediatric patients

• Young children may present with irritability, vomiting, or refusing lights rather than saying “headache”; meningitis remains in the differential when fever and ill appearance coexist
• Migraine equivalents can include recurrent abdominal pain or benign paroxysmal vertigo—pediatric-specific referral when recurrent

Pregnancy

• Physiologic headache can occur; severe headache with hypertension, visual changes, or epigastric pain may be associated with preeclampsia—obstetric emergency pathways when criteria met
• Medication choices in pregnancy require prescriber guidance—avoid independent OTC recommendations outside protocol

Chronic neurologic disease

• Conditions such as multiple sclerosis may present with neuropathic pain or migraine comorbidity; sensory symptoms need careful comparison with prior baseline

⚠️Red Flags

• Thunderclap onset reaching maximal intensity within seconds to a minute—may be associated with subarachnoid hemorrhage and other neurovascular emergencies
• “Worst headache of life,” new pattern in a person with no prior comparable history, or headache waking from sleep every time
• Fever with stiff neck, confusion, or petechial rash—meningeal or systemic infection may be in the differential
• Focal deficits: weakness, numbness, facial droop, aphasia, neglect, or sudden visual loss—activate stroke pathways per facility when criteria met
• Headache after head trauma, especially on anticoagulation or antiplatelet therapy—intracranial bleeding may be considered
• Severe headache in pregnancy or postpartum with hypertension, visual changes, epigastric pain, or seizures—obstetric emergency evaluation
• Papilledema, progressive focal neuro signs, or rapidly declining Glasgow Coma Scale—urgent escalation

🩺Neurologic assessment priorities

ABCs and immediate safety

• Airway protection if vomiting or declining consciousness; suction and positioning per unit standards
• Protect from falls when headache is sudden, severe, or paired with gait or vision change

Vitals and risk context

• Full vital set including blood pressure; repeat when thunderclap or hypertensive emergency is suspected
• Point-of-care glucose when stroke, metabolic, or altered consciousness pathways apply
• Pregnancy status and last menstrual period when relevant to headache with hypertension

Symptom clarification and focused observation

• Document onset tempo, location, quality, photophobia/phonophobia, and prior similar episodes
• Observe speech, face, arms, eyes, and gait; pair with stroke screening tools used in your facility when indicated

Use facility early warning scores (for example NEWS2 where adopted) when systemic illness or sepsis may accompany headache.

🛠️Immediate Non-Pharmacological Nursing Interventions

Safety and environment

• Dim lights and reduce noise when photophobia or phonophobia dominate—comfort measure that does not replace red-flag evaluation
• Offer a cool compress and quiet space when tolerated; minimize unnecessary stimulation during severe attacks
• Fall precautions when vertigo, gait instability, or sudden severe headache occurs with neuro symptoms

Monitoring and escalation

• Track pain and nausea scores on a defined schedule when symptoms are severe or evolving; use SBAR with exact aura and headache onset times
• Repeat vitals when thunderclap features, pregnancy-related hypertension, or systemic infection are possible
• Prepare for ordered antiemetics, IV fluids, or migraine-specific acute therapy—per protocol and prescriber orders

Medication administration (within scope)

• Give prescribed triptans, gepants, NSAIDs, or antiemetics on time; document response, chest symptoms, and sedation
• Avoid independent OTC recommendations outside protocol when red flags for secondary headache have not been addressed by the team

Preventive migraine regimens, ergot derivatives, opioids, magnesium or fluid orders, and imaging decisions require prescriber direction—nursing focuses on recognition, monitoring, safe administration, and clear communication.

📝Documentation Focus

• Patient’s words for pain (throbbing, pressure, worst ever) plus aura description (type, duration, resolution) and change from usual migraine pattern
• Onset time of headache and aura, associated nausea, neck stiffness, fever, vision changes, weakness, or speech changes
• Vitals, pain scores, anticoagulant and medication history, allergies, and notifications with times
• Response to prescribed analgesics or antiemetics; repeat assessments after interventions

📈How This Sign / Symptom Progresses if Untreated

• Isolated migraine attacks often peak and then improve over hours to days, but severe nausea may lead to dehydration and electrolyte disturbance without antiemetic support and fluids when indicated
• High-frequency migraine may contribute to disability, missed work or school, and mood burden when not addressed with comprehensive plans
• Medication-overuse patterns can transform episodic migraine into chronic daily headache—early recognition of analgesic frequency matters
• When red-flag features are present, delay in evaluating secondary causes (vascular, infectious, hypertensive) can allow irreversible harm—escalation trumps assumption of migraine

🚨Escalation Criteria

Align with local stroke, neurosurgery, obstetric, infectious disease, and rapid response protocols—categories below are prompts, not substitutes for policy.

Treat atypical or escalating migraine-like pain with objective monitoring when red flags are possible—timely escalation protects patients from neurologic and systemic harm.

💡Clinical Pearls

• Document aura onset, peak, and resolution; prolonged aura or motor involvement should prompt urgent clinician review
• Compare this attack with the patient’s last three episodes—pattern breaks are often the first clue to secondary pathology
• Medication-overuse can hide behind “frequent migraine”; ask specifically about days per month of acute analgesic use
• Antiemetics may restore oral intake but do not replace evaluation for thunderclap headache, focal deficits, or meningismus

🔗Related Conditions, Tests, and Treatments

Selected related conditions, tests, and treatments to support assessment, escalation, and patient education.

💬Emergency search phrases patients use (intake cues)

These phrases reflect common patient search language (plain-language intent), including seriousness, urgency, and when-to-seek-care queries that often accompany symptom searches. This block is written for clinicians and nurses: use it to guide history-taking, anticipate concerns, and align education—not as direct answers to give patients verbatim.