Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Fainting ?
    ### Response:
    Fainting is a temporary loss of consciousness. If you're about to faint, you'll feel dizzy, lightheaded, or nauseous. Your field of vision may "white out" or "black out." Your skin may be cold and clammy. You lose muscle control at the same time, and may fall down.
    