Because children and teenagers are more flexible, back pain is not as common in this age group as it is in adults. Only about 1 in 4 young competitive athletes and 1 in 6 young recreational athletes will have occasional back pain. Back pain in a child that occurs immediately after an injury or an athletic event should be checked by a doctor.
Back pain in children and teens may also be caused by an overuse injury. Children or their parents may not be able to remember when the back problem started or to recall an injury or change in activity that triggered the back problem. Carrying a heavy backpack may increase a child's chances of a back problem or injury.
Back pain that is severe enough to limit a child's activity or that lasts for 2 weeks or longer needs to be checked by a doctor.
Children sometimes imitate the behavior and symptoms of adults and older children in the family. Symptoms may be caused by other problems they are having in the home or at school. When these problems are present, it is important to help the child and family find appropriate counseling and support.
WebMD Medical Reference from Healthwise