Everyone's spine has natural curves, they are what make our shoulders round and make our lower back curve slightly inward. However, in some people their spine also curves from side to side and this condition is called Scoliosis. In these cases, unlike poor posture, these curves can't be corrected simply by standing up straight.
In scoliosis, the spine curves from side to side. In most cases, the cause of scoliosis is unknown. Both boys and girls develop scoliosis, but girls are four times more likely to require surgery than boys. The condition develops gradually, typically between the ages of 10 and 16, and may progress during your child’s growth spurt years. Scoliosis is painless and easy to miss, but can become apparent during a routine physical exam.