A condition where the spine abnormally curves from side to side. It most often occurs in teenage years, but can develop in the womb or childhood. It can be one, two to three smaller curves and they can cause damage to the spinal joints and disks over time. Most of the time they are small but can be very large and cause health problems such as restricting nerve flow to organs. If the curves are severe, surgical intervention may be required by using rods to straighten the spine.