Usually it is normal to have some small increase in body temperature after surgery, which is due to the stress reaction of surgical trauma, or absorption of heat, or even some patients may have fever due to cold and flu after surgery, but the temperature will not rise too much, usually not more than 38 degrees. If the temperature continues to exceed 38 degrees, accompanied by swelling, pain and fever in the joint, it is necessary to pay attention to it. Do not take care of it at home. The consequences of infection are very dangerous, as the bacteria may eat away at the reconstructed ligaments and destroy the joint cartilage. It is important that patients pay attention to this.