...how long did they last?

LO is almost 4yo and has been waking up a few nights a week due to leg pain. I think she's accurately describing the pain because she just lays in bed moaning, awake. Then she falls back asleep if we rub her legs.

We're also dealing with occasional nightmares/terrors but that looks very different. She's asleep for that and they come at a different time of night.

LO is on her third wake up tonight due to leg pain. She's asking for medicine but I really hope she can sleep through it.

How did you deal with it? How long did it go on?