Objective Observe the appearance and the density of nueles pulposus (NP) of lumbar prolapsed intervertebral disc (LPID) has changed to definite direction penetrate skin treatment (DDPT) of chinese herbal medicine, the union inquiries into its possible mechanism. Methods 126 cases of LPID treatment front, have the CT or the MRI that same level contrast the condition behind, distinguish contrast changes of the appearance and density with the swelling type, the lumbar disc herniation type and the take off type. Results The appearance and density of NP is basic to have no the variety of the swelling type and the lumbar disc herniation type with 39.85%; but the appearance and density of NP shows the changes of the take off type and the lumbar disc herniation type with 60.15% ;the appearance of NP average contracts 76.34 % ; the density average turns down 21.26 %. Condusion DDPT has to show the dissolves function to NP after the fiber wreath and the ligaments of take off type.
