Stiffness in the neck can arise as a result of disorders and diseases of any structure in the neck. The neck contains seven cervical vertebrae that are the bony building blocks of the spine in the neck; these vertebrae surround the spinal cord and canal. Between these vertebrae are discs and nearby pass the nerves of the neck. Within the neck, other structures and organs include the neck muscles, arteries, veins, lymph glands, thyroid gland, parathyroid glands, esophagus, larynx, and trachea. Cervical stiffness is most commonly due to damage to the bones, nerves, and/or muscles of the neck.