What distinguishes a classic migraine headache from a common migraine headache?

A classic migraine headache is specifically characterized by the presence of an aura, which can manifest as visual disturbances, such as flashes of light, blind spots, or other sensory disruptions that occur before the headache phase begins. This aura phase can occur in the hours leading up to the headache and is a pivotal diagnostic criterion that distinguishes classic migraines from common migraines.

While common migraines can also be accompanied by symptoms such as nausea, vomiting, or sensitivity to light and sound, they do not involve the premonitory aura that defines classic migraines. The distinction is essential for proper diagnosis and treatment, as the presence of an aura can inform healthcare providers about the specific treatment options that may be most effective for the patient.