The following causes are common: 1, back trauma: such as back soft tissue sprain or spinal fracture, can lead to serious edema in the back, soft tissue tension will increase compression of nerves, so that nerve conduction dysfunction, thus showing clinical symptoms of numbness in the back. 2, back soft tissue infection: such as septic infection, will cause serious local edema, so that nerve conduction dysfunction, the same clinical symptoms of numbness. 3, cervical spondylosis: the attack will compress the nerve root, which can cause the clinical symptoms of numbness on one or both backs. After timely diagnosis and treatment, the clinical symptoms can be quickly relieved, and patients should usually pay attention to the protection of the back and cervical spine to prevent the occurrence of the above lesions.