1. Migraines can be classified as either primary or secondary headaches. Primary migraines include migraine without aura, migraine with aura, and tension-type headaches. Secondary migraines are caused by underlying structural or metabolic abnormalities.
2. Migraines can originate from extracranial or intracranial pain-sensitive structures. Common extracranial structures include the sinuses, eyes, ears, teeth, and blood vessels. Intracranial structures include arteries, dural veins and sinuses, and the meninges.
3. Migraines are treated either acutely to stop an attack or preventively to reduce frequency and severity. Acute treatments aim to rapidly relieve pain and associated