My ds 2.3 woke up crying last night, managed to get out of him that his knee hurt. (Said "My poor knee's a bit sore" through his sobs bless him)
It might have been cramp in his leg I suppose, (although don't ever recall having had cramp in my knee) and he did fall and scrape his other knee the day before but he was holding the unscraped leg.
I suffered with "growing pains" in both legs when I was little (between 6 and sixteen though so not this young) and remember how horrible they were, anybody else's dc have these pains?
I remember that paracetamol and a hot water bottle helped me but with him being so young don't really want to do either if there is another effective remedy, or do you think it might have been something else? He was really upset and it took ages of cuddles and stroking his poor little knee before he was happy to go back to bed again.