question: YES YOU MAY.. MY LEGS ARE WEAK, UNSTEADY, FEEL LIKE A LOOSE WAGON WHEEL.. WITHIN 10 TO 20 STEPS THEY TIGHTEN SO I CAN HARDLY BRING THEM FORWARD FOR A STEP.. AT NIGHT... JERKING, CRAMPING, STIFFENING.. INVOLUNTARY MOVEMENT. I CANNOT WALK... GETTING WORSE.. IF I PUSH IT AND TRY TO SHOP OR WHAT EVER... IT MAKE IT MUCH WORSE AND I CAN HARDLY CONTROL MY STEP... I HAVE HAD BACK SURGERY.. LEGS AND VEINS CHECKED OUT COMPLETLY.. I THINK THIS BETWEEN THE MUSCLES AND BRAIN... I DO HAVE FIBROMYALGIA AND LUPUS AMONG OTHER THINGS... PLEASE HELP NO ONE HAD BEEN ABLE TO FIGURE THIS OUT AND IT S GETTING WORSE.