Cervical spondylosis can cause numbness in the lower legs because the type of cervical spondylosis is spinal cervical spondylosis, which is caused by herniated lumbar discs, cervical spine osteophytes and compression of the spinal cord due to ossification of the posterior longitudinal ligament and hypertrophy of the ligamentum flavum, resulting in symptoms of spinal cord compression, including numbness and weakness of the extremities. In severe cases, there may be instability when walking, a feeling of stepping on cotton or no heel when walking, numbness in the lower legs, and in more serious cases, there may be urinary and fecal disorders, and symptoms such as incontinence or constipation may occur. This type of cervical spondylosis often requires surgery, which can be chosen to enlarge the spinal canal and reduce the symptoms of spinal cord compression leading to numbness in the legs. Also neck injuries should be avoided during conservative treatment, which may lead to acute quadriplegia.