Lumbar fusion, also known as spinal fusion, is a surgical treatment option. Lumbosacral pain after lumbar fusion may be related to unfused vertebrae, loosening of internal fixation devices, and lesions of adjacent vertebrae. 1. Vertebral body not fused: mainly due to premature postoperative activities, or due to the patient’s accompanying chronic diseases, such as diabetes mellitus, which may affect the growth of bones. After lumbar fusion, the vertebral bodies cannot realize true bony fusion, resulting in slight movement of the vertebral bodies under external force, which may cause pain. 2. Loosening of the internal fixation device: Getting out of bed too soon after lumbar spine fusion may lead to loosening of the internal fixation device, which may move and irritate the vertebral body or the surrounding soft tissues, resulting in long-term pain in the low back. 3. Adjacent vertebral lesions: the load on the upper and lower discs adjacent to the two segments of the lumbar fusion will increase significantly, resulting in disc degeneration or lumbar disc herniation, which can cause localized pain. If the lumbar disc herniation compresses the peripheral nerves, it may also cause radiating pain in the lower extremities. When lumbosacral pain after spinal fusion occurs, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.
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