Postoperative hypothermia of deviated nasal septum generally includes reactive fever caused by surgical trauma and postoperative pathologic fever. 1. Reactive fever caused by surgical trauma: since surgery inevitably causes tissue and organ damage and bleeding, the body will have a defensive immune response to remove the decomposition products of the damage and absorb the accumulated blood, which can lead to an increase in body temperature and the emergence of low-grade fever. 2. Postoperative pathologic fever: after surgery, such as wound bacterial infection triggered by nasal septum abscess, decreased resistance combined with viral infection leading to acute inflammation of the upper respiratory tract and other triggers can cause generalized low fever symptoms. When the postoperative temperature check after nasal septum correction shows low fever, it is necessary to reflect with the medical personnel in time, and the doctor will clarify the cause through systematic examination and then standardize the treatment.