Lumbar spinal stenosis minimally invasive more than 20 days of swelling and pain in the buttocks and legs is considered to be related to the surgical site of edema, adhesion, get down to the ground too early or strenuous exercise, and so on. Lumbar spinal stenosis after minimally invasive surgery will have a period of “recurrence”, clinical manifestations of various, which can be manifested as the affected side of the lumbar pain, buttock pain and swelling, etc., may be due to the surgical site of edema caused by nerve compression, adhesion to the nerve root, etc., usually can be relieved on their own, but also can be taken to take methylcobalamin, blood circulation pain relieving tablets and other treatments. In addition, too early postoperative activities or strenuous lumbar exercises will cause pain in the buttocks and legs, which should be reduced, and rehabilitation exercises should be carried out in a gradual and orderly manner according to the doctor’s instructions. Lumbar spinal stenosis minimally invasive more than 20 days buttock leg swelling and pain, should promptly consult a doctor to clarify the cause, under the guidance of the doctor standardized treatment. In addition, the above drugs should also be used under the guidance of a doctor.