Headache Management

Introduction

• Headache management involves accurate classification, non-pharmacological interventions, and pharmacological options, with the American College of Radiology recommending a thorough patient history and accurate documentation of headache frequency 1, 2, 3

Diagnosis

• Migraines are characterized by a pulsating quality, unilateral location, moderate or severe pain intensity, and aggravation by or causing avoidance of routine physical activity, with a definitive diagnosis requiring at least two of these characteristics and at least one of nausea and/or vomiting or photophobia and phonophobia, as defined by the International Classification of Headache Disorders (ICHD-3) 4
• The diagnostic criteria for migraine are outlined in the following table:

• Thunderclap headache is a critical danger sign for headaches requiring immediate medical attention, as defined by the American College of Radiology 6, 7
• Focal neurological deficits, altered mental status, neck stiffness, and headache following trauma are danger signs for headaches that may indicate life-threatening conditions such as subarachnoid hemorrhage, stroke, or meningitis, as noted by the American Heart Association and American Stroke Association 6, 7

Imaging and Testing

• Neuroimaging is generally not recommended for children with primary headaches and normal neurological examinations, with the yield of brain MRI in children with primary headaches being very low, with less than 1% having relevant findings to explain headaches, as suggested by the American College of Radiology 1
• MRI with contrast is recommended to evaluate for secondary signs of increased intracranial pressure in patients with pseudotumor cerebri, as recommended by the American College of Radiology 1
• MRI of brain with sagittal T2-weighted sequence of craniocervical junction is recommended for patients with Chiari malformation, as recommended by the American College of Radiology 1
• Immediate non-contrast head CT is recommended for patients with thunderclap headache or suspected subarachnoid hemorrhage, with a sensitivity of 98% for acute subarachnoid hemorrhage, as recommended by the American College of Radiology 1
• If CT is negative but clinical suspicion remains high, lumbar puncture should be performed to rule out subarachnoid hemorrhage or meningitis, as recommended by the American College of Radiology 1

Treatment

• First-line treatment for migraine includes NSAIDs, with a strength of evidence rated as high 5
• Second-line treatment includes triptans, with a strength of evidence rated as moderate 5
• Preventive treatment options include beta blockers, antiepileptics, antidepressants, and anti-CGRP monoclonal antibodies, with a strength of evidence rated as low 5
• The American Academy of Neurology recommends acetazolamide as the first-line treatment for headache, starting with a dose of 250-500mg twice daily, titrating up as needed, with a maximum dose of 4g daily, though many patients tolerate 1g/day, and warns patients about side effects such as diarrhea, dysgeusia, fatigue, nausea, paresthesia, tinnitus, vomiting, and depression 8
• The American Academy of Neurology suggests using NSAIDs or paracetamol for the headache component, with indomethacin being preferred due to its ICP-reducing effect, and advises against using opioids for headache treatment, while considering migraine preventatives if the headache has migrainous features 8
• The American Academy of Family Physicians recommends metoclopramide or prochlorperazine for nausea and vomiting 3
• Epidural blood patch (EBP) is indicated if conservative measures fail after 1-2 weeks, with a high success rate for the first attempt, as recommended by the American College of Neurosurgery 9

Special Populations

• The management of migraine in children and adolescents may differ from adults, with approaches including bed rest, ibuprofen for acute treatment, and propranolol, amitriptyline, or topiramate for prevention, as recommended by the American Academy of Pediatrics, with a strength of evidence rated as low 5
• In older adults, there is a higher risk of secondary headache, comorbidities, and adverse events, with limited evidence base for all drugs in this age group, as noted by the American Geriatrics Society, with a strength of evidence rated as low 5
• Pregnant women have limited medication options, with acetaminophen being the safest for acute treatment, according to the American College of Obstetricians and Gynecologists, with a strength of evidence rated as moderate 3

Lifestyle Modifications and Medication Overuse

• The American Academy of Neurology emphasizes the importance of lifestyle modifications, including limiting caffeine intake, ensuring regular meals and adequate hydration, establishing an exercise program and sleep hygiene, and considering behavioral and stress management techniques 8
• The American Academy of Neurology recommends monitoring for and addressing medication overuse headache, and suggests that non-opioids and triptans may be stopped abruptly or weaned within a month, while opioids should be gradually removed over at least one month 8
• The American Academy of Family Physicians warns that overuse of opioids can lead to dependency, rebound headaches, and eventual loss of efficacy 3

Common Errors and Pitfalls

• Failure to obtain neuroimaging for patients with red flag symptoms is the most common diagnostic error in subarachnoid hemorrhage, and can result in delayed diagnosis and treatment, as noted by the American College of Radiology 6, 7
• Dismissing sentinel headaches can lead to delayed diagnosis and treatment of subarachnoid hemorrhage, and is a critical error in the evaluation of patients with thunderclap headache, as suggested by the American College of Radiology 6, 7
• Failure to recognize chronic migraine can lead to misdiagnosis as frequent episodic migraine or tension-type headache, highlighting the importance of careful documentation of headache frequency and characteristics, with a strength of evidence level of moderate 4
• Overlooking medication overuse can complicate diagnosis and management, and the American Academy of Neurology recommends that medication use be carefully monitored and managed, with a strength of evidence level of moderate 4