Steel nailing after a fracture usually has no symptoms of pain. The specific situation is that the fracture occurred after the internal fixation of steel nails, usually need to be anesthetized before the operation, lower limb fracture can be used lumbar anesthesia, lumbar and hard anesthesia, while most of the upper limb fracture using brachial plexus anesthesia, cervical plexus anesthesia, or even general anesthesia, so the patient in the operation when the patient’s pain is completely lost, there will be no pain when playing the steel nails symptoms. If the patient uses local anesthesia, there will be no pain when incising the soft tissue and peeling the periosteum, but it will stimulate the local nerves and cause pain when drilling steel nails, mainly due to the local anesthetic drug can’t infiltrate the depth, and it can’t make the periosteal nerves completely paralyzed. Therefore, in the steel nail fixation, will produce a certain degree of pain, but the patient can usually tolerate.