A severe, recurring headache, usually affecting only one side of the head, characterized by sharp pain and often accompanied by nausea, vomiting, and visual disturbances.

• 偏头痛一种严重的，经常发作的头痛，通常只发作于头的一侧，表现为剧烈的疼痛，常伴随有恶心，呕吐及视觉混乱等症状