1.Diagnosis: According to the detailed and accurate history, combined with the patient’s physical signs and auxiliary examination, its diagnosis is not difficult. Common classification: (1) Lumbar 4, 5 intervertebral disc paracentral herniation. (2) Lumbar 5 sacral 1 intervertebral disc paracentral herniation (3) Lumbar 3, 4 intervertebral disc paracentral herniation (4) Central lumbar disc herniation (5) complete rupture of the annulus fibrosus of the intervertebral disc, nucleus pulposus fragmentation into the vertebral canal, often combined with symptoms of cauda equina, should be treated with emergency surgery (6) complex and rare lumbar disc herniation: accompanied by lumbar stenosis, lumbar vertebral spine slippage, high-level lumbar disc protrusion, extreme lateral lumbar disc protrusion, lumbar disc protrusion, lumbar disc protrusion. Lumbar disc herniation, the nucleus pulposus breaks into the dural sac, some surgical failure. 2, lumbar disc herniation imaging examination Ordinary X-ray examination is necessary, generally refers to the lumbar spine of the front and side position, sometimes to shoot the pelvic plain film to exclude the sacroiliac joint and hip joint problems.CT scan is a common examination, but often concentrated in the lumbar 4, 5 and lumbar 5 sacral 1, and there is a leakage of the diagnosis and the possibility of misdiagnosis.MRI examination can be three-dimensional imaging, safe and non-invasive, can show multi-segmental lesions, especially for the sacro-caudal tumors and other bone diseases can be performed. MRI can show multi-segmental lesions, especially for sacrococcygeal tumors and other bone diseases. Differential diagnosis: (1) Tuberculosis of lumbar spine. Tuberculosis patients mostly have systemic symptoms, such as low fever, night sweats, emaciation, anemia, accelerated blood sedimentation, etc., X-ray and CT imaging examination has bone destruction, paravertebral abscess and other characteristics. (2) Lumbar spine tumor. Including intravertebral canal tumors and vertebral body and accessory tumors, the latter are mostly metastatic tumors. There is no history of trauma, progressive aggravation, rest can not be relieved, imaging examination should be combined with X-ray, CT and MRI to analyze, can not be based on one kind of examination to draw conclusions. (3) Strain lumbago. Most of the pressure and pain sites are in the sacroiliac part of the paravertebral muscles, with no obvious radiating pain in the lower limbs, and no abnormalities in CT and other examinations. (4) Lumbar spinal stenosis. Intermittent claudication is the most prominent symptom, and there are few abnormal signs on examination. (5) Acute and chronic articular synovial joint lesions and lumbar spine instability or even slippage. (6) Sacroiliac and hip diseases. (8) Abdominal and pelvic lesions.