Herniated Discs
Spinal discs can develop cracks, causing leakage of the internal cushioning material. This material can rest in the spinal cords or nerves, resulting in symptoms such as arm numbness as well as pain that radiates down an arm.
Ligament Stiffness
The tough cords that connect your spinal bones together can get stiffer with time, which can have a negative impact on your neck movement and make it feel tight.
Injury
Injuries are another likely cause of cervical spondylosis. If you have had an injury on your neck (probably from a fall or a car accident), this can accelerate the aging process.