Surgery is not recommended when the human body is feverish. Most of the causes of human fever are due to bacterial or viral infections that invade the human body and release a large amount of endotoxin, thus causing the body temperature to rise at a regulated point. At this time, if surgery is performed, it is easy to cause the infection to worsen, the patient’s own resistance has already declined, surgery will cause further trauma, high surgical risk and the formation of unforeseen complications, surgery is more dangerous, but it is also relative, if it is an emergency surgery, without surgery can not solve the disease, there may be life-threatening, the need for surgical treatment, despite the risk of postoperative, but timely surgical treatment is the only option. Whether surgery can be done in fever is selective. Emergency surgery may not be possible and must be done, but elective surgery can be prolonged as much as possible to bring the body to the best condition before surgical treatment, which has a high success rate and low risk.