Knee pain after minimally invasive disc surgery may be related to touching a nerve root during surgery and pressure on the knee during surgery. Minimally invasive disc surgery involves removing the herniated disc by inserting instruments between the upper and lower nerve roots. Since the gap between the nerve roots is very small, it is inevitable that the nerve roots will be touched during the removal process, resulting in a transient functional abnormality of the nerve roots, which will lead to a functional abnormality of the innervation of the knee area, which will be manifested as pain and numbness, and the symptom will disappear very quickly after appropriate rest and oral neurotrophic drugs. Minimally invasive intervertebral disc surgery, if you choose to lie down position for surgery, the knee joint is not placed in a soft pad to protect, the knee will be compressed by the postoperative pain, usually after appropriate rest, the pain will be relieved on its own. If knee pain occurs after minimally invasive disc surgery, it is recommended that the patient go to the hospital to consult a doctor for regular treatment.