This is a common spinal condition. The causes can range from muscular to degenerative changes in the cervical spine. An MRI scan can identify most structural factors that could account for the neck pain. Additionally xrays (in different positions) and a CT scan may be required. Disc prolapse can cause nerve compression and sometimes requires surgery.
The treatment options range from conservative treatment, ancillary treatments, injections and in selected cases surgery for fusion of the spine.
Nice guidelines link iscks.nice.org.uk/neck-pain-non-specific cks.nice.org.uk/neck-pain-cervical-radiculopathy