Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Motion Sickness ?
    ### Response:
    Motion sickness is a common problem in people traveling by car, train, airplanes and especially boats. Motion sickness can start suddenly, with a queasy feeling and cold sweats. It can then lead to dizziness and nausea and vomiting.    Your brain senses movement by getting signals from your inner ears, eyes, muscles and joints.
    