Lumbar foramenoscopy surgery twenty days of calf pain may be due to the relatively heavy injury, nerve compression has not yet recovered, postoperative nerve adhesion, calf itself disease and other reasons. 1. Trauma leading to nerve compression: lumbar laminectomy is a minimally invasive surgery, commonly used for lumbar disc herniation in young adults. If the patient’s preoperative injury is relatively heavy, the symptoms of nerve compression, postoperative pain in the calf area, in general, is a normal phenomenon. Because the nerve is compressed or directly damaged, the recovery is relatively slow, and it takes a long time of rehabilitation, physical therapy and other auxiliary treatments to slowly recover after surgery. 2. Postoperative adhesion and primary disease of the calf: small exposure of the field of intervertebral foramenoscopy surgery, the operation may cause nerve pulling and stimulation, coupled with the operation itself, such as oozing, may cause adhesion of the nerve tissues after surgery, which may also lead to postoperative symptoms of calf pain; in addition, the disease of the calf itself may lead to postoperative pain in the calf, such as osteoarthritis of the lower limbs, synovitis, varicose veins of the lower limbs, and so on. There may be other reasons for calf pain after lumbar laminectomy, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.