It is the single most common complaint in whiplash trauma, being reported by over 90% of patients. Often this pain radiates across the shoulders, up into the head, and down between the shoulder blades. Whiplash injuries tend to affect all of the tissues in the neck, including the facet joints and discs between the vertebrae, as well as all of the muscles, ligaments and nerves.
Facet joint pain is the most common cause of neck pain following a car accident. Facet joint pain is usually felt on the back of the neck, just to the right or left of center, and is usually tender to the touch. Facet joint pain cannot be visualized on x-rays or MRIs. It can only be diagnosed by physical palpation of the area.
Disc injury is also a common cause of neck pain; especially chronic pain. The outer wall of the disc (called the anulus) is made up of bundles of fibers that can be torn during a whiplash trauma. These tears, then, can lead to disc degeneration or herniation, resulting in irritation or compression of the nerves running through the area. This compression or irritation commonly leads to radiating pain into the arms, shoulders and upper back, and may result in muscle weakness.
Damage to the muscles and ligaments in the neck and upper back are the major cause of the pain experienced in the first few weeks following a whiplash injury, and is the main reason why you experience stiffness and restricted range of motion. But as the muscles have a chance to heal, they typically don’t cause as much actual pain as they contribute to abnormal movement. Damage to the ligaments often results in abnormal movement and instability.