which phase of a migraine headache usually lasts less than an hour?
Aura - This is the most popular term understood by the general public in reference to migraines. 1  Aura is the next phase in migraine progression and usually lasts less than one hour. While many people associate aura to the visual disturbances associated, there may be other symptoms, such as: 1  visual disturbances â flashing lights, wavy lines, spots, partial loss of sight, and blurry vision. 2  olfactory hallucinations â smelling scents that are not present.