Herniated discs are classified according to the location of the herniated disc, cervical disc herniation and lumbar disc herniation. The thoracic spine and sacral spine generally do not have herniated discs, while cervical disc herniation is generally divided into two types: compression of nerve roots and compression of spinal cord. The main symptoms of compression of nerve roots are numbness and pain in the upper limbs, unilateral, and if the spinal cord is compressed, there will be weakness of the limbs, positive pathological signs, and symptoms of walking with a feeling of popping cotton. Lumbar disc herniation is generally divided into two types: herniation mainly compresses the nerve root on one side, which shows pain from the hip to the lower extremity on one side and no pain in the lower back; there is also a bulging type, and the bulging type mainly compresses the intervertebral disc backward, which generally produces lumbar pain if the lumbar disc herniation is not large. If the protrusion is relatively large, it may cause symptoms on both sides of the lower limbs, but it is generally rare.