Needle knife can treat lumbar disc herniation. Small needle knife is very effective in relieving the symptoms of back pain caused by lumbar disc herniation. Because lumbar disc herniation is often accompanied by fasciitis of the lumbar back, the fascia of the lumbar back is often in a state of high tension, and the dermal nerves within the fascia may be subject to entrapment, and the relaxation of the fascia by needle knife can reduce the tension of the fascia, and at the same time can reduce the compression of the dermal nerves, which can alleviate the low back pain caused by the lumbar disc herniation. However, needle knife is not capable of intravertebral operation, so it cannot solve the problem of lumbar disc herniation compressing the nerve root. In order to completely solve the problem of lumbar disc herniation, it is still necessary to remove the herniated disc tissues through surgical treatment.