Most of the patients with lumbar disc herniation, who have undergone surgery, have numbness in their feet after surgery, which is a normal manifestation. After surgery, the nucleus pulposus is removed, or decompression or internal fixation is given, and the nerve is partially damaged during the surgery, which can cause numbness in the feet after the surgery. If the numbness is not reduced or continues to worsen, the patient needs to go to the hospital in a timely manner, and the situation of the lumbar nerve roots can be clarified through nuclear magnetic film or electromyography, and then take symptomatic treatment according to the specific disease.