Until more recently, a complaint of back pain in a child or adolescent was considered uncommon. It was usually associated with a certain condition such as curvature of the spine, a broken spinal bone, inflammation, a tumor, or infection.More recently, however, reports of back pain among children are much more common. It is not clear why but may be due to children carrying heavier backpacks or sitting longer due to increased computer use. By the age of fifteen, 20-70 percent of children will re...