The back of the spine to feel the protruding bones may be a normal physiological structure, if accompanied by pain, activity limitation, do not rule out pathological lesions. 1. Physiological structure: the human spine has a similar protruding physiological bony structure, anatomically known as the spinous process, the cervical vertebrae are the most obvious, the role is to protect the spine. If there is no pain, activity limitation symptoms, belong to the physiological, no effect on the body. 2. Pathological lesions: scoliosis, kyphosis, spinal fracture or spondylolisthesis, spinal tuberculosis, bone tumor, ankylosing spondylitis, spondylolisthesis and other bone diseases or bone injuries may cause abnormal bony protrusions, accompanied by pain, activity limitation and other symptoms. There may be other reasons for the protruding bones in the spine of the back, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.