What Are the Symptoms of Migraine Without Aura?
Migraine without aura is diagnosed based on specific symptom criteria established by the International Headache Society (IHS, 2022). At least five attacks meeting the following criteria are required for diagnosis.
Head Pain Characteristics: Moderate to severe throbbing or pulsating pain, usually on one side of the head
- Pain worsening with routine physical activity such as walking, climbing stairs, or bending forward
- Attacks lasting between 4 and 72 hours without treatment
- Pain severe enough to interfere with or prevent daily activities
Associated Symptoms
- Nausea with or without vomiting
- Photophobia (sensitivity to light)
- Phonophobia (sensitivity to sound)
- Osmophobia (sensitivity to smell) in some individuals
- Difficulty concentrating or thinking clearly during an attack
Phases of Migraine Without Aura
Prodrome phase: Early warning signs appearing 1 to 2 days before the headache including mood changes, food cravings, neck stiffness, frequent yawning, and increased thirst.
Headache phase: The primary attack phase, which lasts four to seventy-two hours and is characterized by throbbing head pain and related symptoms.
The postdrome phase: This can last up to 24 hours after the headache goes away, is often characterized as a migraine hangover that includes weariness, dizziness, and slight headache pain.
What Causes Migraine Without Aura?
Neurological Causes
- Trigeminal nerve activation: Migraine without aura involves activation of the trigeminal nerve (the main pain pathway in migraines), triggering the release of CGRP (calcitonin gene-related peptide), an inflammatory pain-signaling chemical that dilates blood vessels and amplifies pain signals
- Serotonin dysregulation: Serotonin levels drop during a migraine attack, causing blood vessels to dilate and activating pain pathways in the brain
- Cortical hyperexcitability: The migraine brain is neurologically hypersensitive (overly reactive) to internal and external stimuli, making migraine attacks more likely in response to triggers
Genetic Factors
- Migraine without aura has a strong hereditary component, with first-degree relatives of affected individuals being two to three times more likely to experience the condition
- Multiple genes involved in serotonin regulation, ion channel function, and pain processing have been identified as contributors to migraine susceptibility
Common Triggers
- Stress and emotional upheaval
- Hormonal fluctuations, particularly estrogen drops around menstruation
- Poor or irregular sleep
- Skipping meals or dehydration
- Aged cheeses, red wine, processed meats, and MSG (monosodium glutamate)
- Bright lights, loud noise, or strong smells
- Weather changes, particularly barometric pressure drops
How Is Migraine Without Aura Diagnosed?
Migraine without aura is diagnosed clinically based on symptom history. No specific blood test or imaging is required in most cases.
Diagnostic Criteria
- At least five attacks lasting 4 to 72 hours without treatment
- Head pain with at least two of the following: one-sided location, throbbing quality, moderate to severe intensity, worsening with physical activity
- At least one associated symptom: nausea or vomiting, photophobia, or phonophobia
- Symptoms not better explained by another diagnosis
When Imaging Is Needed
- New onset severe headache described as the worst headache of life
- Headache with fever, stiff neck, confusion, or neurological symptoms
- Progressive worsening of headaches over weeks
- Headache beginning after age 50 for the first time
How Is Migraine Without Aura Treated?
Acute Treatment
Acute treatments are taken at the onset of an attack to relieve pain and associated symptoms.
- Take acute medication at the earliest sign of a migraine attack for the best response
- Move to a quiet, dark room and rest until symptoms improve
- Apply a cold compress to the forehead or neck to reduce pain intensity
- Stay hydrated by sipping water steadily, especially if vomiting is present
- Avoid screens and bright light during the attack to reduce photophobia-related discomfort
Acute Medications
- Triptans such as sumatriptan and rizatriptan are the most effective acute medications for moderate to severe migraine without aura and work by constricting dilated blood vessels and blocking CGRP release
- NSAIDs such as ibuprofen and naproxen sodium are effective for mild to moderate attacks
- CGRP antagonists (gepants) such as ubrogepant are a newer class of acute medications with strong clinical evidence and fewer side effects than triptans for some individuals
- Antiemetics such as metoclopramide relieve nausea and vomiting and can enhance absorption of oral pain medications
Preventive Treatment
Preventive treatment is recommended when migraine without aura attacks occur more than 4 days per month or significantly impact daily life.
- Beta-blockers such as propranolol and metoprolol reduce attack frequency by stabilizing blood vessel reactivity
- Antidepressants such as amitriptyline reduce central pain sensitization and migraine frequency
- Antiepileptic medications such as topiramate and valproate reduce cortical hyperexcitability
- CGRP inhibitors such as erenumab and fremanezumab are the most targeted and effective preventive options currently available
- Magnesium supplementation (400 to 600 mg daily) is widely recommended as a well-tolerated first-line supplement
Lifestyle Strategies to Reduce Migraine Without Aura Frequency
- Maintain a consistent sleep schedule, going to bed and waking at the same time every day
- Eat regular meals every 3 to 4 hours and stay well hydrated throughout the day
- Keep a migraine diary to identify and avoid personal triggers
- Practice daily stress management techniques such as mindfulness, deep breathing, or yoga
- Limit caffeine intake to fewer than 200 mg per day and avoid sudden caffeine withdrawal
- Exercise moderately for at least 30 minutes five days per week to reduce cortisol levels and improve overall migraine threshold
When Should You See a Doctor?
- Migraine attacks occur more than 4 days per month
- Over-the-counter medications are not providing adequate relief
- Migraines are significantly affecting work, relationships, or daily activities
- Attack frequency or severity is progressively increasing
- New or unusual symptoms develop alongside familiar migraine attacks
Conclusion
About 75% of migraineurs experience migraines without aura, which is the most prevalent type. Without any prior neurological warning signs, a migraine without aura causes moderate to severe throbbing head pain, nausea, and sensitivity to light and sound. Trigeminal nerve activation and serotonin dysregulation are two ways that stress, hormonal fluctuations, inadequate sleep, and dietary factors can trigger an attack.
The best way to lessen the frequency and intensity of migraine attacks without aura attacks is to combine preventive measures, regular lifestyle management, and acute treatments like NSAIDs and triptans. For a customized treatment plan, anyone with frequent or incapacitating migraines should see a neurologist or headache specialist.
