Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of High Blood Pressure ?
    ### Response:
    High blood pressure is often called the "silent killer" because you can have it for years without knowing it. The only way to find out if you have high blood pressure is to have your blood pressure measured. Complications When blood pressure stays high over time, it can damage the body and cause complications.
    