Lumbar disc herniation symptoms: 1. History of chronic lumbar injury Lumbar disc herniation often occurs on the basis of the original disc degeneration, while chronic injury can contribute to disc degeneration. Typical patients with lumbar herniation have a history of chronic lumbar strain to varying degrees, such as frequent bending work, sprain of the lumbar region caused by picking up heavy objects or sudden rotation of the lumbar region, and later left with recurrent lumbar and hip pain. The acute attack of disc herniation was triggered by the increase of abdominal pressure and contraction of muscles on both sides of the spine caused by coughing, sneezing, constipation, cold, bending and weight-bearing, etc. on a certain occasion. 2.Prodromal symptoms: low back pain Lumbar disc herniation develops on the basis of degenerative disc changes, and the symptoms caused by degenerative disc changes can be present for a period of time before the occurrence of disc herniation: low back pain. The main reason for low back pain is that the herniated disc tissue stimulates the outer fibrous ring, the posterior longitudinal ligament and the sinus nerve fibers of the dural sac, causing muscle tension pain in the paravertebral muscle groups of the low back. Low back pain can occur either before leg pain or at the same time or after leg pain. Patients have a wide range of low back pain, mainly in the lower back or lumbosacral region, which is deep and imprecisely localized, usually dull, stabbing or radiating pain, and this radiating pain area is distributed according to the original embryonic region of the birth osteotomy. There are two types of low back pain seen clinically; one type is widespread dull pain in the low back, which starts slowly, worsens whenever there is activity, increases when taking a position for a longer period of time, and decreases after resting or lying in bed. The symptoms of low back pain rarely affect work completely. The other type of low back pain has a sudden onset, the low back pain is very serious, the muscle spasm in the low back pain area, and all kinds of activities in the low back are restricted because of the pain, which seriously affects life and work. This kind of acute low back pain is heavier in the first few days of onset, and can be gradually reduced later. It usually lasts for a long time and can be relieved only after 3~4 weeks. These two types of pain are the former for the intervertebral disc fiber ring is still intact, the latter is the fiber ring more suddenly all or large part of the rupture, the nucleus pulposus protrusion. 3, typical symptoms: radiating neuralgia in the lower extremities Because a large disc herniation can compress the nerve root and cauda equina nerve, causing radiating pain in the lumbosacral nerve, which is the main reason for patients to visit the clinic. If the herniation occurs in the lumbar 4/5 and lumbar 5/sacral 1 intervertebral spaces, the patient will experience sciatica; if the herniation occurs in the lumbar 3/4 and above segments, femoral neuralgia, closed-hole neuralgia or lateral femoral cutaneous neuralgia will occur. Lower extremity radiating pain may occur after, during, or before low back pain. Sciatica mostly occurs gradually, starting with dull pain, gradually increasing, mostly radiating from the buttocks, posterior lateral thigh, lateral calf, radiating to the heel or dorsum of the foot, and in a few cases, radiating pain from the bottom to the top, first from the foot, lateral calf, posterior lateral thigh, and then radiating to the buttocks. In order to reduce the pain, some patients often adopt a lumbar forward bending and knee flexion position to relax the tension of the sciatic nerve. As a result, patients are willing to take the forward leaning position when walking, and the bending, lateral, flexed medulla and flexed knee position (triple flexion position) when resting in bed, and in severe cases, patients only sleep in the thoracic knee position. By the same mechanism, patients complain of less pain when riding a bicycle than when walking. Sciatica may be aggravated by activity or increased abdominal pressure in a certain posture, or sudden onset of electric shock-like radiating pain, radiating from the lumbar region to the lower extremities. 4.Symptoms of secondary spinal stenosis: intermittent claudication. 5.Severe motor nerve injury: muscle paralysis. 6.Sensory nerve disorder: numbness of lower limbs. 7.Severe compression of the dural sac: cauda equina syndrome. 8.Vegetational nerve injury: sympathetic nerve dysfunction. 9, caudal pain Caudal pain can occur in lumbar disc herniation, which has two main causes. One is neurogenic, due to the protruding disc tissue prolapsing into the sacral canal, and also due to the anatomical variation of the lumbosacral plexus stimulating the nerve; the second is jointogenic, due to the sacroiliac joint synovial part misalignment stimulating the sacrococcygeal nerve.