The 5th day after lumbar spine surgery, anti-repeated fever needs to be treated according to the etiology, generally can take physical cooling, ibuprofen cooling drugs and antibacterial drugs, if necessary, surgical treatment. 1. Absorption of fever: due to lumbar spine surgery, local tissue damage, bleeding, postoperative tissue repair, hematoma absorption will have a mild fever belongs to the absorption of fever, generally can be taken to physical cooling and other measures, if necessary, the use of ibuprofen cooling drugs. 2. Infection: including local incision infections and central nervous system infections, can cause patients with postoperative recurrent fever. For treatment, timely improve the blood routine and other inflammatory indicators, bacterial culture, etc., according to the results of drug sensitivity to carry out anti-infection treatment, strengthen the dressing change, active drainage, if necessary, surgery to remove the internal fixation materials. The fifth day after lumbar spine surgery, recurrent fever is recommended to consult the doctor in time, improve the actual examination to find out the cause of the disease, and carry out further targeted treatment.