There are the following complications after lumbar disc herniation fusion surgery: First, the most common is the acceleration of the degeneration of the adjacent vertebrae, after the fusion surgery for lumbar disc herniation, the fusion of the two operated vertebrae into one will make the adjacent vertebrae under increased stress, which will especially lead to the acceleration of the degeneration of the vertebrae, including the formation of osteophytes, hypertrophy and calcification of the ligaments, and even lead to the formation of lumbar disc herniation in the adjacent vertebrae. This can lead to the formation of new lumbar pain symptoms, and in serious cases, even lead to lumbar spinal stenosis. Second, after the fusion surgery for lumbar herniation, because of the fusion of the vertebrae, the mobility of the lumbar region will be reduced to a certain extent, although it is not particularly obvious, but the angle of movement is smaller than normal.