Ladies, I've noticed my daughter's legs are restless at night. Today she was crying, saying her legs…

Ladies, I've noticed my daughter's legs are restless at night. Today she was crying, saying her legs were tired. In the morning, she says only one hurts. She fell yesterday, so I'm wondering if it's related. There's no swelling or bruising, she's not limping, and she's jumping around. Could it be growing pains or from the fall? I'll keep an eye on it, and if needed, we'll see a doctor. If her leg hurts again tonight, what can I give her? Is there anything I can rub on it?