Lumbar 4~sacral 1 intervertebral disc backward bulging dural sac compression, generally can be cured, if the symptoms are mild can be treated conservatively, if the symptoms are heavy can be surgical treatment. Lumbar 4~sacral 1 intervertebral disc backward bulging dural sac pressure is mostly due to long-term poor posture, weight-bearing activities and other factors, resulting in lumbar spine degenerative changes, the nucleus pulposus protrudes backward, compression of the dural sac caused. Because there are spinal cord, nerve roots and other tissues inside the dural sac, the compression can cause low back pain, leg pain and numbness, defecation disorders and other symptoms. If there is no low back pain, leg pain, numbness and other symptoms or symptoms are very mild, conservative treatment can be taken, oral non-steroidal anti-inflammatory drugs, such as ibuprofen and other anti-inflammatory pain, but also oral methylcobalamin and other nutritive nerve drugs. Physical therapy such as lumbar traction and massage can also be performed under professional guidance. At the same time should pay attention to avoid lumbar trauma and cold, pay attention to rest. If the lumbar pain, leg pain, numbness and even defecation disorder are serious, which seriously affects daily life and work, and the effect of conservative treatment is not good, surgery can be considered to remove the protruding nucleus pulposus and relieve the compression of the dural sac. The examination found that lumbar 4 ~ sacral 1 intervertebral disc backward bulging dural sac pressure, it is recommended that under the guidance of the doctor, combined with their own situation, choose the appropriate treatment. Do not blindly use medication and treatment on your own, so as not to delay the condition.