Cervical spondylosis mainly includes the following types: 1. neurogenic cervical spondylosis, in which a herniated disc presses backward on the nerve roots and causes numbness and weakness in the upper limbs, but does not cause numbness in the legs. 2. spinal cord cervical spondylosis, in which a herniated disc presses backward on the central nerve and causes numbness and weakness in the limbs, leading to paralysis in severe cases, does cause numbness in the legs, and does not cause a single leg numbness but weakness in the limbs and a sense of cotton when walking. 3. 3, vertebral artery type cervical spondylosis, the main manifestation of which is the increase of dizziness after turning the head, does not lead to lower limb numbness. 4, sympathetic nerve type cervical spondylosis, various reasons to stimulate the cervical sympathetic stem sympathetic excitatory effect, does not lead to lower limb numbness. 5, esophageal type cervical spondylosis, mainly the intervertebral disc protrusion forward compression of the esophagus resulting in swallowing difficulties, does not lead to lower limb numbness. In summary, only spinal cord type cervical spondylosis may lead to lower extremity numbness, and not a single numbness, combined with other clinical symptoms.