I have really bad restless leg syndrome?

RLS is really hard to explain. But it's like you have electric surges going through your legs and you have to move them or you'll go crazy. It's the worst feeling ever. It always comes when I'm trying to sleep. I'm a 14 year old girl, and I don't know what to do to treat it. My mum and I asked the doctor about it but he said because I'm so young, he can't prescribe a medicine for me. Is there anything else I can do? Any tricks or tips so to speak? Thank you! xx