How Can severe Leg Pain In A 6 Year Old Boy Be Treated?

I have a 6yr old son, and the last couple of nights he has been saying that his legs feel weird . I thought maybe its growing pains which hes had many many nights before. Growing pains were solved with some ibuprofen and a little massage, but this is different. He said he cant describe the feeling. i asked is it tingly, itchy, numb, does he feel like he needs to walk around, and he said no to all of them. I know hes tired because hes cying but he cant fall asleep because of the weird feeling, any ideas?