English-Chinese/Up to one-third of migraine people have an aura

Up to one-third of migraine people have an aura: typically a short period of visual disturbance that signals that the headache will soon occur. Occasionally, there is only a little or even no headache after a migraine aura.

多达三分之一的偏头痛患者有先兆：通常是短暂的视力障碍，表明头痛很快就会发生. 偶尔，偏头痛先兆后只有一点甚至没有头痛.