Posterior decompression and fusion internal fixation of lumbar spine is a surgical procedure to treat lumbar spine diseases. The purpose of the surgery is to fuse the destabilized lumbar vertebrae and enhance the stability of lumbar vertebrae, so the lumbar vertebrae may lose part of its motor unit after the surgery, and the patients may suffer from after-effects such as lumbar stiffness and mild limitation of activities, which may affect normal sleep and range of lumbar spine activities. After posterior decompression and fusion internal fixation of the lumbar spine, you need to take more rest, pay attention to your personal habits, and try to avoid repetitive bending, fatigue and heavy physical labor. If there are any uncomfortable symptoms, consult the doctor in time and take corresponding treatment according to the doctor’s advice.