1. Low back pain: Low back pain is the first symptom that occurs in most patients with this disease, with an incidence of about 91%. A few patients have only leg pain without lumbar pain, so that not every patient will definitely have lumbar pain. 2. Lower limb radiating pain: low back pain is easy to attack after trauma, exertion and cold, each time for 2 to 3 weeks, and can be gradually relieved. During the attack, such as bed rest, the pain is often reduced. Those who engage in heavy physical labor, especially those who repeatedly bend over, have a high probability of having lumbar pain. 3. Restricted activity: The forward flexion and backward extension activities of the lumbar spine in patients with lumbar disc herniation are closely related to the degree of disc herniation. If the fibrous ring is not completely ruptured, the lumbar spine takes a forward-flexed position and posterior extension is restricted, which in the long run leads to osteophytes in the lumbar spine of patients, degeneration and osteophytes in the posterior joints appear, lumbar disc herniation and degeneration lead to narrowing of the intervertebral space and relaxation of the intervertebral disc, and osteophytes in the upper joint synapse can further narrow the intervertebral foramen and increase the chances of nerve root compression. Yellow ligament hypertrophy, calcification, chronic lumbar muscle strain can make the yellow ligament hypertrophy, but also produce secondary spinal stenosis, resulting in long-term recurrent back pain, soreness, followed by the serious consequences of intermittent claudication, and finally lead to paralysis is also possible. 4, nerve damage: is a serious lumbar disc herniation hazards, nerve damage is the main reason for the ruptured nucleus pulposus herniated disc into the spinal canal, compression of nerve roots, will cause the corresponding limbs appear intolerable strong pain, serious cases need to inject morphine and other strong analgesic drugs to relieve. If the lumbar disc herniation develops into secondary stenosis of the spinal canal, or if the nucleus pulposus continues to protrude until it is completely dislodged into the spinal canal, it will compress the spinal cord and produce another serious nerve damage – cauda equina syndrome. The specific manifestations are: nerve damage is progressive, sensory impairment is manifested as numbness, reduced or absent sensation in both lower limbs and perineum; sphincter dysfunction is manifested as weakness in urination and defecation, urinary retention, urinary and fecal incontinence, and impotence may also appear in male patients. 5. Lateral spine protrusion: This is a postural compensatory deformity taken by patients with lumbar disc herniation to reduce pain. The lumbar vertebrae are bent to the left or right, and skewed spinous processes can be found by touching the spinous processes in the middle of the back, but this is not a unique sign of lumbar disc herniation, as about 50% of normal people also have skewed spinal spinous processes.