Headaches caused by high blood pressure can usually be relieved by taking antihypertensive drugs. Headache caused by high blood pressure is due to the increase in intracranial pressure caused by the increase in blood pressure, which in turn causes cerebral vasospasm caused by insufficient cerebral blood supply, brain tissue metabolism of waste products can not be discharged resulting in headache symptoms. After taking antihypertensive drugs, blood pressure drops, cerebral vasospasm can be relieved, cerebral blood supply is restored, and the symptoms of headache can be partially or completely relieved. However, it should be noted that if one-time taking too much antihypertensive drugs, lowering the blood pressure too violently, can lead to abnormal expansion of cerebral blood vessels resulting in excessive perfusion of brain tissue, can also cause headaches and dizziness of the adverse effects. Hypertensive patients in the process of treatment to lower blood pressure must require smooth and slow, not to pursue the effect of lowering blood pressure with too much medication, blood pressure in the short term drop too much body can not tolerate. When the headache caused by high blood pressure, should be timely to the hospital examination and treatment, so as to avoid delaying the condition.