Back numbness to consider the following reasons: first, back fasciitis: mainly due to prolonged ambulatory work, often bending, low labor, often backpack walking, carrying heavy objects, carrying a load, these activities will appear to increase the load on the lumbar back fascia, over time will appear lumbar back fasciitis, and thus will appear lamellar pain and lamellar sensory abnormalities of the lumbar back, including back numbness. Secondly, thoracic spinal stenosis: when the spinal cord is squeezed in the thoracic spine, there will be a bundle-like sensation in the anterior chest and the posterior back, manifested as numbness and discomfort in the anterior chest and the posterior back.