The lumbar isthmus is the isthmus between the upper and lower articular processes of the vertebral arch on one or both sides of the lumbar spine. Long-term chronic strain on the lumbar spine leads to a stress fracture, causing a fracture of the isthmus, which in turn leads to symptoms of lumbar spondylolisthesis. A lumbar isthmus fracture leads to lumbar spine slippage, also known as true slippage. Due to laxity of the surrounding ligaments and instability of the vertebral space, the superior vertebra moves forward or backward relative to the inferior vertebra, resulting in lumbar spine slippage. With the aggravation of the slippage, the spinal cord nerves in the spinal canal produce compression symptoms, and the patient develops back pain, lower limb pain, numbness and other symptoms The lumbar vertebrae in our body are connected together, relying on the cartilage cushion between the vertebrae and the vertebral body, that is, the intervertebral disc. The upper vertebra has an inferior articular eminence, and the next vertebra has an superior articular eminence, which is hooked tightly together like a hook. In some patients, it breaks at the cheek and the “hook” loses its effect, causing the lumbar spine to slip. So how should I treat a lumbar isthmus? If there are no obvious symptoms, no special treatment is needed. For adolescents and children, they need to actively continue to observe, pay attention to rest, avoid strenuous activities, and avoid bending and weight-bearing. For adults and even middle-aged and elderly patients with ischial fissure, the first treatment can be conservative lumbar circumference fixation, functional exercise of the lumbar back muscles, anti-inflammatory and analgesic and nerve nutrition and other symptomatic treatment. If conservative treatment is not effective, surgery is then required.