Scoliosis is abnormal side-to-side curvature of the spine. The spinal curve may develop as a single curve (shaped like the letter C) or as two curves (shaped like the letter S). In children and teens, scoliosis often does not have any noticeable symptoms and may not be noticeable until it has progressed significantly. The two most common forms are degenerative scoliosis and idiopathic scoliosis (adolescent). Three orthopedically approved options exist for combating scoliosis: observation, bracing, or surgery.