She is 7. Has complained for a few hours on and off. Tried deep heat but had to wash it off as she said it stung. Have given her Calpol. I am a worrier. DH thinks it might be a muscle she has pulled as she said it has hurt since she got her bike out yesterday.
Back pain in children is quite common but usually clears up quickly. If it doesn't clear up and the chest xray is normal there are some more tips for prevention here Back Pain in Children. Hope it helps.
Sounds very worrying but chest xray does seem a bit odd as the pain is lower down in her back...let us know how you got on at the hospital, hope DD is feeling a bit better and it turns out to be muscular or something.