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偏头痛系由于神经体液功能的病理性增高,引起颅内、外血管收缩后的继发性扩张所致的一种特殊类型的发作性血管性头痛,具有其独特的发病机理和临床表现,故不能与由其它原因所致的偏侧性头痛混为一谈。典型偏头痛病人常在青春期发病,且多有家族遗传史。头痛呈发作性。发作前常先出现眼前闪光、暗点或偏盲等视觉性先兆(系因脑和眼底血管痉挛所致)。一般持续10～20分钟后缓解,随即出现一侧(有时为双侧)搏动性头痛或胀裂痛(系因颅外血管的继发性扩张所致),并逐渐增剧至最高峰和
Migraine headache is due to the pathological increase of neurofacial function, causing intracranial and extravascular vasoconstriction caused by the secondary expansion of a special type of septic vascular headache, has its unique pathogenesis and clinical manifestations, therefore Can not be confused with other side-effects headache. Typical migraine patients often occur in adolescence, and many have a family history. Headache was episodic. Occur before the onset of the first immediate flash, dark spots or hemianopia and other visual aura (due to brain and fundus caused by vasospasm). Usually 10 to 20 minutes after the remission, then appear on one side (sometimes bilateral) pulsating headache or bulging pain (due to secondary expansion of extracranial blood vessels caused), and gradually increased to the peak and