If there is still pain in the leg after minimally invasive surgery for lumbar disc herniation, consider the causes of incomplete decompression, nerve edema, nerve re-compression, and lack of postoperative exercise. 1. As the herniated disc may have several locations to compress the nerve, one or several places of nerve compression are not found before or during the operation, or the minimally invasive surgery can only relieve the compression of individual parts, resulting in incomplete decompression. 2. Surgical removal of the intervertebral disc to relieve nerve compression, after the nerve is suddenly relieved of compression, a short period of rebound edema phenomenon occurs, resulting in lower limb pain symptoms. 3. Surgical removal of the intervertebral disc, local bleeding to form hematoma, or postoperative local scar formation, again compressing the nerve, causing pain in the lower limbs. 4. Late postoperative exercise, exercise is not in place, resulting in postoperative nerve adhesion, leg pain during exercise. After minimally invasive surgery for lumbar disc herniation, there is still pain in the leg, if it is difficult to relieve, it is recommended to actively seek medical attention and treatment under the guidance of a physician.