Pain one and a half years after spinal surgery may be caused by muscle injury, neurovascular injury, aseptic inflammatory edema and other reasons. 1. Muscle injury: after spinal surgery, it will lead to local muscle tissue injury, if the muscle function training is not carried out normally or correctly, the local muscle tissue spasm, atrophy, so that the tension of lumbar fascia increases, and the phenomenon of pain one and a half years after spinal surgery may occur. 2. Neurovascular injury: after spinal surgery, abnormal proliferation of bone or tissue cells in the affected area may lead to pain one and a half years after spinal surgery when the spine compresses local nerves or blood vessels. 3. Aseptic inflammatory edema: If you keep a posture for a long time during the one and a half years of spinal surgery, it will lead to the emergence of local aseptic inflammatory edema, which will lead to the phenomenon of pain one and a half years after spinal surgery. It is recommended to go to the hospital in time for examination and diagnosis, to clarify the cause of the disease, and to carry out targeted treatment under the guidance of a professional doctor, so as not to have an impact on the health of the body.