What causes dizziness, headache, nausea?

Dizziness headache nausea causes are very complex, can be considered hypertension, cervical spondylosis, encephalitis, brain abscess, cerebral hemorrhage, subarachnoid hemorrhage, hyperlipidemia, anemia, otolithiasis and other symptoms caused. It is recommended to measure blood pressure first, if blood pressure is too high can take antihypertensive drugs, can not alleviate timely medical treatment.