Elderly people have no energy and limb weakness is a common symptom of cervical spine disease, which can cause such symptoms of cervical spine disease are as follows: First, cervical spondylosis spinal cord type, which will be manifested as lack of energy and limb weakness, and in severe cases, tetraplegia can also occur and affect the function of urination and defecation, which is usually due to the herniated cervical discs compressing the nerves and leading to motor function disorders. Second, cervical spinal stenosis, congenital cervical spinal stenosis and acquired cervical spinal stenosis can cause cervical spinal cord nerves severe ischemia and hypoxia, thus causing weakness and limb weakness. In addition, there are many other systemic diseases that can cause weakness in the limbs of the elderly, and it is recommended to consult a doctor in time to make a clear diagnosis and then carry out the corresponding treatment.