Foraminoscopic surgery for lumbar disc herniation is a minimally invasive procedure that can have an excellent rate of 90-95%. Even though it is a minimally invasive surgery, some patients will still feel pain after laminectomy. Because it is after all a surgical procedure, there is a certain amount of trauma, but of course this damage has been reduced to a very low level compared to traditional surgery. Several causes of postoperative pain with foraminoscopic surgery include muscle damage, injury after arthroplasty, injury to the annulus fibrosus, nerve root irritation, and edema. Most patients with lumbar disc herniation have very obvious pain before surgery, and the original pain is obviously relieved after surgery due to the nerve compression being lifted, so most patients are not very concerned about the newly emerged pain sensation after intervertebral foramenoscopy, but there are still a part of the patients who feel that there is a more obvious pain, and there are also some patients who have their pain relieved after the surgery, but it comes up again soon afterward; some patients who have the lumbar pain sensation still remain after the surgery; and some patients have the lumbar pain sensation still remain after the surgery. The feeling is still there; some patients feel pain all over the body …… What is the reason for all these situations? Is it necessarily that the surgery is not done properly? Early postoperative back pain is often the pain of the wound, generally not very intense, taking anti-inflammatory analgesic drugs can be relieved or improved, generally 3-5 days after surgery can be significantly improved. Postoperative rebound pain In some patients, the pain disappears after surgery, but soon reappears, this situation is called rebound pain. This situation is mainly due to the edema and irritation of the nerve root. After taking out part of the herniated disc, a gap will be left and it will be filled with tissue edema and bleeding. At this time, although the disc is no longer pressing on the nerve, the clot and necrotic tissue will irritate the nerve, and the nerve itself will become congested and edematous. Over time, the clot is absorbed by the body, the edema subsides, and the nerve root gradually gets During this recovery process, some patients experience a significant exacerbation of symptoms. Usually the aggravation starts from 3-5 days after surgery and lasts up to 2-4 weeks, and in a few patients it lasts for 2-3 months before gradual recovery. Postoperative wandering pain Some patients feel that not only the lower back and leg pain, but also pain in other parts of the body, and the pain site, pain sensation will be constantly changing, this is considered a wandering pain, and the process of nerve recovery is related to the nerves in the process of recovery, the nerves in the process of recovery will become more sensitive to external stimuli, resulting in a decrease in the pain threshold, in fact, it is a good change, the need to assist some of the neurotrophic drug therapy, most with the nerve function, and then the pain threshold will be decreased. This is actually a good change, which needs to be supplemented by some neurotrophic medication, and most of them will gradually improve with the repair of nerve function. Postoperative mechanical low back pain Intervertebral foramenoscopy removes the protruding nucleus pulposus and reduces the compression of the nerve root, but the intervertebral disc is a joint, and the surgery itself does not improve the function of this joint, and it needs postoperative rehabilitation, especially targeted muscle rehabilitation exercises to improve the stability of the spine. Therefore, part of the patient’s leg pain symptoms improve, but still residual part of the lumbar pain, which is related to the stability of the segment itself decreased, and older patients, in addition to the surgical segment, other neighboring lumbar spine motion segments also exist in a certain degree of degeneration, which can also cause low back pain.