Elderly people who cannot walk are considered to be related to spinal cord cervical spondylosis, cerebrovascular disease, lumbar spinal stenosis and osteoarthritis. 1. Spinal cord cervical spondylosis: due to herniated intervertebral discs or spinal stenosis compressing the spinal cord, the lower limbs are weak and unable to walk. 2. Cerebrovascular disease: for example, cerebral infarction or cerebral hemorrhage causes unfavorable movement of the lower limbs, generally unfavorable movement of one side of the lower limbs, accompanied by sensory impairment. 3. Lumbar spinal stenosis: hypertrophy of ligamentum flavum or arthrogryposis compressing the spinal cord can appear walking with limp, lower limb weakness, and severe inability to walk. 4. Osteoarthritis: narrowing of joint space, joint swelling, deformation, limited joint movement and other symptoms. 5. Hypokalemia: due to insufficient intake or excessive loss of potassium, hypokalemic paralysis occurs resulting in inability to walk. Elderly people who can’t walk need to go to the hospital for examination and treatment after clarifying the cause of the disease.