The spine is a collection of many small bones, which allow a person to stand and move, they can be 32 or 33. There are three types of spinal curvature: the first is 'scoliosis' which deviates to the left and right in an 'S' shape when viewed from behind; the second is 'kyphosis' or humpback; the third is 'lordosis' where the spine digs in, usually at the pelvic area. Signs: legs are not the same length, difficult and unable to walk far, shoulders are not aligned, head is tilted...