Chills after surgery may be caused by the following reasons: 1, it may be the side effects of anesthesia, especially general anesthesia surgery may lead to shivering and chills after surgery, after the anesthesia completely metabolized, this symptom will naturally disappear. 2, it may be the process of the surgery too much bleeding leads to anemia, after surgery, the blood volume decreases and chills. 3, it may be the surgical process accidentally cold, cold and caused by symptoms, especially thoracic and abdominal surgery must be completely undressed to be able to carry out, and the temperature inside the operating room is more than 20 degrees Celsius. 3, may be the process of surgery inadvertently cold, cold and the symptoms caused by the operation, especially the chest and abdomen surgery must be completely undressed to be able to carry out, and the temperature inside the operating room is more than 20 degrees Celsius or so, so the physically weaker people are very easy to catch a cold during the operation, cold, after the operation can appear chills and other conditions.