The human spine is divided into five segments: cervical, thoracic, lumbar, sacral and caudal. Different segments have different physiologic curvatures, for example, the cervical and lumbar vertebrae are forward physiologic curvatures while the thoracic and sacral vertebrae and the caudal vertebrae are backward physiologic curvatures. Physiological curvature inversion is that the spine loses the direction of normal physiological curvature and bends in the opposite direction, such as cervical and lumbar inversion, the cervical spine is the backward physiological curvature, and the lumbar spine is also the backward physiological curvature, which is often due to the cervical and lumbar vertebrae have undergone degeneration and lead to. Cervical and lumbar spine disease will appear physiological curvature recoil, commonly in cervical spondylosis and lumbar spine degeneration, this time, we should carry out relevant physical examination and further CT, MRI, to exclude whether there are cervical spine diseases, such as cervical disc herniation or lumbar disc herniation, cervical or lumbar spinal stenosis, etc., so the physiological curvature recoil is a kind of pathologic change, which is often predictive of cervical or lumbar vertebrae degeneration. It is often indicative of cervical or lumbar spine degeneration.