Warmth in the knee after a tibial fracture is normal depending on the etiology. It may be caused by inflammatory infection, local skin temperature rise, excessive exercise, etc.. 1. Inflammatory infection: the fracture site caused by the irritation reaction of fluid accumulation, can knee cause fever, belong to the abnormal performance, need to be dealt with. 2. Increased local skin temperature: Fracture localized soft tissue injuries, local skin temperature increases during the recovery period, which is a normal phenomenon. 3. Excessive exercise: in the process of recovery, the local adhesive tissue is torn, appearing knee heat pain, this is a normal phenomenon. Tibia fracture knee fever, it is recommended to timely hospital consultation, improve the examination, clarify the cause of the disease, under the guidance of the doctor for standardized treatment.