Intervertebral foraminoscopy for lumbar disc herniation is a minimally invasive procedure that can have an excellent rate of 90-95%. Despite being a minimally invasive procedure, some patients may still experience pain after foraminoscopy. Because it is, after all, a surgical procedure, there is a certain amount of trauma associated with it, but of course this damage is reduced to a very low level compared to traditional surgery. Several causes of postoperative pain from foraminoplasty include muscle damage, post-arthroplasty damage, injury to the annulus fibrosus, nerve root irritation, and edema. Most patients with lumbar disc herniation have very obvious pain before surgery, and after surgery, the original pain is obviously relieved because the nerve compression is lifted, so most patients do not care much about the new pain sensation after laminectomy, although there are still some patients who feel more obvious pain, and some patients have pain relief after surgery, but it appears again soon afterwards; some patients have back pain after surgery. Feelings are still there; some patients feel pain all over their body ……, why are these situations? Is it necessarily because the surgery was not done well? Early postoperative back pain is often wound pain, which is generally not very intense and can be relieved or improved after taking anti-inflammatory and analgesic drugs, generally 3-5 days after surgery can be significantly improved. Postoperative rebound pain Some patients’ pain disappears after surgery, but it appears again soon, and this condition is called rebound pain. This condition is mainly due to edema and irritation of the nerve roots. After the herniated disc is partially taken out, a space will be left, which 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 be 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. The exacerbation usually begins 3-5 days after surgery and lasts up to 2-4 weeks, and a few patients last 2-3 months before gradually recovering. Postoperative wandering pain Some patients feel pain not only in the back and legs but also in other parts of the body after surgery, and the pain site and pain sensation will keep changing. Most of them will gradually improve with the repair of nerve function. Post-operative mechanical low back pain Intervertebral foraminal surgery removes the herniated nucleus pulposus and reduces nerve root compression, but the disc itself is a joint, and the surgery itself does not improve the function of this joint, and requires post-operative rehabilitation, especially targeted muscle rehabilitation exercises to improve spinal stability. Therefore, some patients have improved leg pain, but some lumbar pain remains, which is related to the decreased stability of this segment itself, and in older patients, in addition to the operated segment, other adjacent lumbar spine motion segments also have some degeneration, which can also cause lumbar pain.