Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Restless Legs ?
    ### Response:
    Restless legs syndrome (RLS) causes a powerful urge to move your legs. Your legs become uncomfortable when you are lying down or sitting. Some people describe it as a creeping, crawling, tingling, or burning sensation. Moving makes your legs feel better, but not for long.
    