Low back pain is a group of symptoms, and its common causes are: ① Acute or chronic injuries: acute or chronic injuries to the lumbar or leg muscles, fascia, ligaments, intervertebral small joints, crural fracture or dislocation, intervertebral disc injuries, etc.; ② Degenerative changes: crural osteoarthropathy, senile osteoporosis, intervertebral disc degeneration, spinal stenosis, etc.; ③ Congenital dysplasia: crural cryptic bifida, vertebral body or appendicular malformation, crural Inflammatory changes: tuberculosis of the crural column, ankylosing crural inflammation, rheumatic fibrositis or myofasciitis, rheumatoid arthritis, sacroiliac arthritis, osteoarthritis of the knee, etc.; ⑤ Functional deficiencies: poor posture, pregnancy, flat feet, unequal length of the lower limbs, or insufficient gluteal muscle strength, etc.; 6. Visceral diseases: diseases of the urinary and reproductive organs, liver disease, etc.; (7) Tumors: primary bone tumors, metastatic bone tumors, neural tumors, etc.; (8) Other: excessive obesity, blood disorders, endocrine disorders, psychiatric factors, and the impact of bedding. Therefore, patients with symptoms of low back pain do not necessarily have herniated discs. As many diseases can cause low back pain symptoms, the identification of these diseases need to have rich orthopedic clinical experience in order to make the physician, so the diagnosis of lumbar herniation should be careful.