Leg soreness after minimally invasive surgery for herniated disc is normal if it is a symptom of nerve irritation, and abnormal if it is an early complication due to radiculitis, residual free nucleus pulposus herniation, etc. The main causes of leg soreness after minimally invasive lumbar disc herniation surgery are as follows: Nerve compression is lifted after surgical removal of the disc, and the sudden lifting of nerve compression can lead to rebound edema in the body in order to adapt to the internal environment. At this time, it will affect the blood supply of the nerve, so that the conduction function is impaired and the appearance of lower limb pain symptoms. This phenomenon is normal and usually resolves after a few days of treatment. Persistent leg pain after minimally invasive lumbar spine surgery for nerve root decompression is an early postoperative complication. At this time, the causes of leg pain include adhesions around the nerve root, radiculitis, residual free nucleus pulposus protrusion, hematoma compression or stimulation of nerve fibers by undetected herniation of dural fissure, and so on. Minimally invasive lumbar disc herniation surgery before, during and after surgery must be enhanced care.