Contraindications after lumbar spinal nailing include lumbar trauma, strenuous exercise and infection. 1. Lumbar trauma: Lumbar spinal stapling generally refers to internal fixation of lumbar pedicle screws, which can treat lumbar fractures, lumbar spondylolisthesis or lumbar disc herniation and other diseases. After internal fixation, we should avoid lumbar trauma, mainly because trauma may cause loosening of the internal fixation, stress fracture, internal fixation fracture and other occurrences, and in serious cases, damage to the spinal cord, nerves or blood vessels, and so on. 2. Strenuous exercise: after lumbar internal fixation, we need to pay attention to lumbar movement, especially lumbar fusion screw internal fixation, lumbar fracture internal fixation in the early stage, allow appropriate lumbar activities, avoid strenuous lumbar activities, in order to avoid strenuous activities lead to internal fixation loosening and failure. 3. Infection: avoid infection, especially bacterial infection caused by bacteremia, septicemia, etc., because bacterial infection will reach the screw fixation position with blood, causing infection around the internal fixation, resulting in the loosening of the internal fixation.