Lying down headache sitting up does not hurt, to pay attention to monitoring blood pressure, for most patients lying position blood pressure will be high, lying position into sitting or standing position, the human body blood will be redistributed, part of the venous blood will be stagnant to the sagging parts of the body, will cause the amount of blood back to the heart to reduce the amount of blood, the arterial blood pressure will fall, the decline will not be more than 20mmHg. hypertension caused by the headache, and the level of blood pressure is significantly correlated, the blood pressure increases headache appeared when blood pressure falls can be alleviated or disappear. There is a clear correlation between the level of blood pressure. Headaches occur when blood pressure rises and can be reduced or disappear when blood pressure falls. Other causes of headache, such as headache caused by nervousness, anxiety, and neurotic headache, are not significantly related to the level of blood pressure. Headaches related to changes in body position are considered to be caused by high blood pressure or high cranial pressure.