Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Dizziness and Vertigo ?
    ### Response:
    When you're dizzy, you may feel lightheaded or lose your balance. If you feel that the room is spinning, you have vertigo.    A sudden drop in blood pressure or being dehydrated can make you dizzy. Many people feel lightheaded if they get up too quickly from sitting or lying down.
    