Quick Answer
Chronic migraine is headache ≥15 days/month with migraine features on ≥8 days — often with medication overuse. Treatment requires comprehensive approach.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Chronic migraine is migraine transformed from episodic to chronic — headache ≥15 days/month with migraine features on ≥8 days. It's often accompanied by medication overuse and is more difficult to treat than episodic migraine. Comprehensive treatment including preventive medications, lifestyle modification and addressing medication overuse is essential.
What is chronic migraine
Definition: headache ≥15 days/month for >3 months, with migraine features on ≥8 days. Transformation: episodic migraine progresses to chronic — 'transformed migraine.' Prevalence: affects ~2% of population — ~1 in 3 chronic headache patients. Medication overuse: often accompanies chronic migraine — MOH is common. Severity: more severe, disabling — higher burden than episodic. Treatment resistance: harder to treat than episodic — requires comprehensive approach.
How episodic migraine becomes chronic
Frequency progression: episodic (≤14 days/month) progresses to chronic (≥15 days/month). Risk factors: frequent attacks, medication overuse, obesity, depression, anxiety. Medication overuse: acute medication overuse is major risk factor — central sensitization. Central sensitization: brain becomes more sensitive to pain — lower threshold. Central sensitization: brain becomes more sensitive to pain — lower threshold. Kindling: repeated attacks sensitize brain — easier to trigger subsequent attacks.
Treatment of chronic migraine
Preventive medications: topiramate, propranolol, amitriptyline, CGRP inhibitors — reduce frequency. CGRP inhibitors: new class — effective for chronic migraine. Botulinum toxin (Botox): FDA-approved for chronic migraine — injections every 12 weeks. Medication overuse treatment: withdraw acute medications — essential if MOH present. Lifestyle: regular sleep, exercise, stress management — reduce triggers. Behavioral: CBT, biofeedback — adjunct to medication. Comprehensive: address all factors — medication, lifestyle, psychological.
Preventive medications for chronic migraine
Topiramate: effective — reduces frequency, may cause side effects (cognitive, weight loss). Propranolol: beta-blocker — effective, well-tolerated. Amitriptyline: tricyclic antidepressant — effective, sedating. CGRP inhibitors: erenumab, fremanezumab — new class, effective, expensive. Botulinum toxin: injections — effective for chronic migraine, requires injections. Valproate: anticonvulsant — effective, weight gain side effect. Combination: may need multiple preventives — individualized approach.
When chronic migraine needs specialist care
If you have headache ≥15 days/month, suspected medication overuse, or migraine not responding to treatment — see a headache specialist or neurologist. Chronic migraine requires comprehensive management.
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When to seek professional evaluation
Chronic migraine is evaluated at headache assessment — because comprehensive treatment requires specialist care.
This guide is educational and does not replace individual medical advice.
Migraine vs Other Headaches — Quick Comparison
| Feature | Migraine | Tension-Type |
|---|---|---|
| Pain | Throbbing, often one-sided | Pressure, band-like, bilateral |
| Severity | Moderate–severe | Mild–moderate |
| Other | Nausea, photophobia, aura | No nausea/vomiting, mild photophobia only |
Table for comprehension — see Migraine guide → for full criteria.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
Stress does not cause migraine alone but lowers threshold and increases frequency, especially with irregular sleep and frequent analgesic use. Dr. Jitendra's approach: diary for frequency/medication days, sleep regularity, hydration, caffeine review, and comorbidity screening (anxiety, insomnia, neck pain). The clinic …
More: All FAQs → · Ask Dr. Jitendra →
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Content on this website is for general educational purposes only and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified healthcare professional. Always seek the advice of your physician or other qualified provider with any questions regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read on this website. In case of a medical emergency, contact emergency services immediately. No doctor–patient relationship is established by use of this site or by contacting the clinic through the site.
References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.