The treatment for walking weakness in the left leg after minimally invasive intervertebral foramenoscopy surgery should be appropriate according to different causes. The common causes include lumbar nerve compression, damage to the spinal cord or nerve roots, etc. The treatment includes physical therapy, medication and surgery. 1. Lumbar nerve compression: after surgery, the surgical site may bleed, and if it is not absorbed, a hematoma will gradually form, compressing the lumbar nerves and resulting in weakness in walking. At this time, baking and hot compresses are used to promote the absorption of the local hematoma and reduce the bleeding. 2. Damage to the spinal cord or nerve roots: the spinal cord or nerve roots may be damaged during the surgery, and walking weakness of the left leg may occur after the surgery. At this time, oral nerve-nourishing medications such as methylcobalamin and vitamin B6 will be taken, and if it continues to be unrelieved or is accompanied by pain and other symptoms, the doctor will diagnose and carry out surgical treatment. There may be other reasons for the weakness of the left leg after laminectomy, it is recommended to go to the hospital in time, under the guidance of the doctor to carry out standardized treatment, the above medication should be taken according to the doctor’s instructions.