Chronic nerve compression is more common in clinical practice, such as carpal tunnel syndrome, elbow tunnel syndrome, and compression of the spinal canal due to chronic intravertebral stenosis. Longer-term compression can lead to nerve dysfunction, such as loss of motor or sensory function, pain, numbness, and paralysis. Studies of pathologic changes following nerve compression can inform treatment choices. Recent studies have shown that surgical decompression in patients with carpal tunnel syndrome can result in a better clinical functional prognosis than anti-inflammatory and hormonal injections. Some scholars believe that the timing of surgical intervention is also an important factor in obtaining satisfactory clinical function, and the earlier the surgery, the better the functional recovery, but there is no high-level research evidence to support this. Recently, an experimental animal study completed by University of California scholars James et al. found that early surgical decompression can re-establish blood flow to the nerves and improve nerve ischemia in an animal model of chronic nerve compression, and the relevant conclusions were published in a recent issue of the JBJS Journal. The subjects of this study were 10 male, 6-week-old C57BL/6 mice, which were divided into 6 groups: nerve crush group (10 cases), 2-week (18 cases), 4-week (18 cases), 6-week (18 cases) chronic nerve compression injury group, and 2-week (18 cases), 6-week (18 cases) chronic nerve compression injury decompression group. The chronic nerve compression injury model was fabricated by the method described by Guptan et al. in Muscle. nerve, and the success of the compression injury model preparation was confirmed by neurophysiological means. The sciatic nerve blood flow was measured by laser speckle method, and the levels of hypoxia-inducible factor 1α (HIF1α), catalase, superoxide dismutase (SOD), and matrix metalloproteinases 2,9 (MMPs) were analyzed in different groups of the mouse nerve model. It was found that chronic nerve compression injury leads to nerve congestion at an early stage and a decrease in nerve blood flow signal at 4 weeks. Similarly, hypoxia-inducible factor 1α (HIF1α), catalase, and superoxide dismutase (SOD) levels were progressively elevated after nerve compression, whereas extracellular matrix-altering proteins were elevated in the later stages of the disease. After early decompression, nerve blood flow is restored and a hypercongested state is observed; whereas, late decompression does not result in the restoration of nerve blood flow signals, which is attributed to the fact that MMP9-mediated structural remodeling of the extracellular matrix of the organelle begins to occur during late decompression, and structural alterations ultimately result in irreversible neurological blood flow deficits. Electromyographic examination of nerve conduction velocities in the test mice revealed that the nerve conduction velocities began to return to normal 2 weeks after surgical decompression in both early and late decompression; however, only the distal nerve latency returned to normal in the early decompression group. The investigators concluded from this study that chronic nerve compression injury can lead to reduced blood flow to the nerve, altering the underlying structure through the upregulation of enzymes such as hypoxia-inducible factor 1α (HIF1α), catalase, superoxide dismutase (SOD), and matrix metalloproteinases 2,9 (MMPs), which can lead to nerve ischemia. Surgical decompression of early nerve compression can restore the normal electrophysiologic function of the nerve better than late nerve decompression.