Thanks for your query.
In kids back pain
is not a common complaint.
More often it is non specific and related to poor posture or undiagnosed muscle sprain
from a minor fall or tripping over.
But in nearly half of kids a specific or serious cause will be found.
Pain that occurs on a daily basis,worsening,wakes him from sleep,associated with fever
are some of the warning features.
He needs a detailed physical examination & certain tests like CBC,CRP,ESR
& MRI spine.
Hope you found the information useful.