Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) High Blood Pressure ?
    ### Response:
    Normal blood pressure for adults is defined as a systolic pressure below 120 mmHg and a diastolic pressure below 80 mmHg. It is normal for blood pressures to change when you sleep, wake up, or are excited or nervous. When you are active, it is normal for your blood pressure to increase.
    