Even if your daughter has a hairline fracture
I would advise you to meet the orthopaedic surgeon
and take his opinion. Its like treating a patient just by hearing his symptoms. The xray needs to be seen by a orthopod
to absolutely make sure that its a hairline fracture which can be managed conservatively in a splint
. Giving her lots of ice packs, analgesics and anti inflamatory drugs will help. Hope this has helped you.