Scoliosis can cause back pain in some cases, especially if the curve is large or severe, or if it affects the lumbar or cervical spine. The pain can result from the abnormal curvature and rotation of the spine, which can strain the muscles, ligaments, and joints that support the spine. The pain can also result from the pressure or compression of the spinal cord or nerves, which can cause inflammation, irritation, or damage. The pain can vary in intensity and duration, and it can affect the daily activities and quality of life of the person who has it.