What is the common feature of all classic migraines?

Classic migraines, also known as migraine with aura, are characterized by the presence of an aura that occurs before or during the onset of the headache. The aura typically manifests as visual disturbances, sensory changes, or other neurological symptoms that precede the migraine attack. This defining feature differentiates classic migraines from common migraines, which do not include an aura.

While the other options may occur in some individuals who experience migraines, they are not universal characteristics of classic migraines. For instance, while migraines are more prevalent in women, they also occur in men. Frequent vomiting can accompany migraines but is not experienced by all sufferers. Additionally, the duration of migraines often exceeds two hours, sometimes lasting for several days, making this timeframe not a defining attribute of classic migraines.

Understanding that the presence of aura is a hallmark feature helps in the correct identification and classification of migraine types, which can guide appropriate treatment and management strategies.