The anatomical descriptions of the IVD include the nucleus pulposus and annulus fibrosus (classic but not as evident in the young), the vertebral endplate, and the marginal listel (apophyseal ring). The IVD infrastructure consists of proteoglycans, collagen, hyaluronic acid, and water with a hydrophilic role, hydraulic shock absorber, and stress transmission according to a tensegrity model (tensional integrity). MR imaging shows the different types of herniated discs and guides the therapeutic decision. The disc pressure is measured in vivo and the endoscopic approach for radiofrequency of the fissure zone is discussed, superseding blind percutaneous approaches.