Normal. According to Baidu Health, bone cutting operations such as mandibular angle and zygomatic bone generally adopt general anesthesia, so some fever symptoms may occur within 2 ~ 5 days after operation, which is a normal reaction after general anesthesia, and there is no need to worry about infection; In most plastic surgery, the postoperative body temperature will increase by 1 ~ 2℃, which is a normal protective reaction of the body. It is called endothermic in medicine, as long as the body temperature does not exceed 38℃. If the fever persists and there is no other unwell reaction in the whole body, there is no need to use antipyretic drugs. This low-grade fever will gradually subside in 2 ~ 3 days.