Intracranial disease Infection: encephalitis(脑膜炎) Vascular disease: cerebral accident Tumor Cranial injury: concussion of brain(脑震荡) varying combination of headache, dizziness, vertigo, impaired memory, irritability and difficulty with concentration Others: migraine(偏头痛) cluster headache(丛集性头痛)Intracranial disease •Infection: encephalitis (脑膜炎) •Vascular disease: cerebral accident •Tumor •Cranial injury: concussion of brain （脑震荡） varying combination of headache, dizziness, vertigo, impaired memory, irritability and difficulty with concentration •Others: migraine （偏头痛） cluster headache （丛集性头痛）