The last two mornings in a row my 4yr son has woken up with pain in both legs. He says it hurts behind his knees. Last night I was up half the night with my almost 2 yr old daughter who was crying "ow ow ow" and pointing at the outside of both her thighs.

Do you think this is just growing pains or is it something I should have checked? When it was just one I wasn't concerned but now that it is both of them I am wondering what is going on with them. Gosh I am such a worry wart