Conventional CT of the cervical spine cannot detect compressed nerves, and CTM (CT enhancement myelography) is needed to indirectly detect compressed nerves, in addition to MRI can also detect compressed nerves. Conventional CT can show whether the intervertebral disc is herniated, whether the cervical spine is calcified, whether there is osteophyte, etc., but it cannot detect the compression of the nerve. However, CTM, that is, computed tomography myelography, can indirectly show the signs of nerve or spinal cord compression. MRI is not sensitive to calcification and ossification, but it is better for nerve compression and spinal cord edema. Therefore, to check for nerve compression, CTM examination or MRI examination can be used to make a judgment. If cervical nerve compression is detected, early and standardized treatment is recommended to reduce the adverse effects of the disease.