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Chronic Migraine

Disabling Headache Disorder Defined by Frequent Migraine Attacks (>15 Days/Month)

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Nöroloji department. Book Appointment →

What is Chronic Migraine?

Chronic migraine (CM) is defined by ICHD-3 criteria as headache (migraine-like or tension-type-like) on ≥15 days per month for >3 months, with at least 8 days fulfilling migraine criteria or responding to migraine-specific therapy.

Affects approximately 1–2% of the global population (versus 12% for episodic migraine), with female-to-male ratio of 3–4:1 and peak prevalence in 30s and 40s.

Pathophysiology involves central sensitization with cortical spreading depression, trigeminovascular activation, neurogenic inflammation, and dysregulation of pain modulation; CGRP, PACAP, and substance P play key roles.

Approximately 2.5% of episodic migraine sufferers transition to chronic migraine annually; major risk factors include medication overuse, female sex, obesity, depression, and stressful life events.

Symptoms

Headache frequency ≥15 days per month for >3 months, with ≥8 migraine days
Migraine features: unilateral, throbbing or pulsating pain, moderate to severe intensity, aggravation by physical activity
Associated symptoms: nausea, vomiting, photophobia, phonophobia, osmophobia, allodynia (cutaneous sensitivity)
Aura in 20–30%: visual (scintillating scotoma, fortification spectra), sensory (paresthesias), motor (rare hemiplegic migraine), or speech disturbance
Concomitant tension-type headache features can be present (mixed pattern)
Comorbidities: depression (40–50%), anxiety (30–40%), obesity (50%), sleep disorders, fibromyalgia, irritable bowel syndrome
Functional impairment: work absenteeism, presenteeism, reduced quality of life, decreased social participation

Risk Factors

Female sex (3–4:1 female-to-male ratio), peak age 30–50 years
Family history of migraine (genetic component)
Episodic migraine progressing to chronic form (annual transformation rate 2.5%)
Medication overuse: simple analgesics ≥15 days/month or triptans/opioids/combinations ≥10 days/month for >3 months (medication-overuse headache)
Comorbid psychiatric conditions: depression, anxiety, post-traumatic stress disorder
Obesity (BMI >30) and metabolic syndrome
Sleep disorders: insomnia, sleep apnea, restless legs syndrome
Major life stressors and chronic stress
Physical or sexual abuse history
Caffeine overuse and abrupt withdrawal
Hormonal factors: menstrual migraine, perimenopause, hormonal contraceptive use

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Headache frequency increasing toward 15 days per month
  • Chronic migraine with treatment failure or progressive disability
  • Suspected medication overuse headache (frequent acute medication use)
  • New-onset severe headache, especially with neurological symptoms (red flags warrant imaging)
  • Headache patterns suggestive of secondary cause: thunderclap, post-traumatic, with focal deficits, papilledema, fever, age >50
  • Persistent migraine with disability despite multiple preventive therapies (refractory migraine)

Treatment Methods

01
Comprehensive evaluation: detailed headache history, headache diary documentation (frequency, duration, severity, triggers, medication use), associated symptoms, comorbidities screening (PHQ-9, GAD-7), neurological examination, MIDAS or HIT-6 disability assessment
02
Imaging: MRI brain not routinely required for typical migraine; indicated for red flags (sudden onset, neurological deficits, age >50 with new headache, change in pattern)
03
Laboratory testing: rule out secondary causes if clinically suspected (TSH, ESR/CRP for elderly, polysomnography for suspected sleep apnea)
04
Lifestyle modifications: regular sleep schedule, hydration, regular meals, stress management, exercise (aerobic 150 min/week), trigger identification and avoidance, weight management
05
Behavioral therapy: cognitive-behavioral therapy (CBT), relaxation training, biofeedback, mindfulness-based stress reduction
06
Acute treatment optimization: triptans (sumatriptan, rizatriptan, eletriptan) at first sign of migraine, NSAIDs (ibuprofen, naproxen), antiemetics (metoclopramide, prochlorperazine), gepants (ubrogepant, rimegepant); avoid opioids and butalbital
07
Limit acute medication use: triptans <10 days/month, simple analgesics <15 days/month to prevent medication-overuse headache
08
First-line preventive therapy: beta-blockers (propranolol, metoprolol), tricyclic antidepressants (amitriptyline 10–75 mg/day), topiramate (50–200 mg/day), valproate (250–1000 mg/day, avoid in pregnancy), candesartan
09
CGRP-targeted preventive therapy: erenumab, fremanezumab, galcanezumab (monoclonal antibodies), eptinezumab (IV); first-line option for chronic migraine with rapid efficacy and favorable side effect profile
10
Onabotulinum toxin A (PREEMPT protocol): 155–195 units injected at 31–39 sites every 12 weeks; FDA-approved for chronic migraine with strong evidence for headache day reduction
11
Withdrawal of overused medication if medication-overuse headache (under guidance with bridge therapy)
12
Refractory chronic migraine: combination therapy, neuromodulation (single-pulse TMS, vagus nerve stimulation, supraorbital stimulation), occipital nerve blocks, cognitive-behavioral therapy with multidisciplinary pain program
13
Comorbidity management: treatment of depression, anxiety, sleep disorders; weight loss; obstructive sleep apnea treatment
14
Long-term follow-up: headache diary review at 3-month intervals, treatment efficacy and side effects assessment, annual reassessment of preventive medication continuation, management of comorbidities, quality of life and disability monitoring

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.