Nerve root edema does not necessarily worsen after lumbar spine surgery, and it is usually not possible to determine how many days the edema is at its worst. After lumbar spine surgery due to the removal of the lumbar disc nerve compression relief, all, edema will gradually improve, usually not aggravated. After lumbar spine surgery, edema is usually aggravated because the nerve is pulled or stimulated during the surgery, causing nerve edema, usually within 3 days of severe symptoms, such as leg pain, leg numbness, lumbar pain aggravation, application of dehydration and edema reduction drugs such as hepcidium saponin sodium, with the prolongation of time most of them will be gradually reduced. Some of them will leave numbness of the lower limbs and muscle atrophy. Therefore, nerve root edema after lumbar spine surgery varies from person to person, not necessarily aggravate, if the symptoms after surgery than before surgery to consider the possibility of nerve edema, follow the doctor’s instructions to use drugs.