If the diastolic blood pressure of an adult is 81 mm Hg, it is within the normal range. A systolic blood pressure of 134 mm Hg is also within the normal range. The normal diastolic blood pressure range for adults should be 60 to 89 mm Hg, so 81 mm Hg is within the normal range. The normal range for systolic blood pressure should be 90 to 139 mm Hg, so 134 mm Hg is also within the normal range. Abnormal blood pressure can cause dizziness, lightheadedness, headache and other such symptoms. Patients with these symptoms need to have their blood pressure checked and measured with a more accurate sphygmomanometer in a resting state. Adults should prevent the occurrence of high blood pressure, if the occurrence of headaches and dizziness should be timely consultation, patients should not self-medication.