The edema of knee as well as lower limbs 5 months after tibial plateau fracture surgery may be caused by excessive exercise, deep vein thrombosis of lower limbs, traumatic arthritis and other factors. 1. Excessive exercise: prolonged restriction of activities after tibial plateau fracture surgery can occur adhesion of the knee joint and local soft tissues. If the patient is over-exercising or weight-bearing on a daily basis, it can cause congestion and inflammation of soft tissues around the knee joint and lower limbs. 2. Lower extremity deep vein thrombosis: prolonged bed rest after fracture surgery, reduced activity, resulting in venous blood flow in the lower extremities in a stagnant state, prone to cause deep vein thrombosis in the lower extremities, can appear in the knee and lower extremity swelling, pain and other symptoms. 3. Traumatic arthritis: Tibial plateau fracture belongs to intra-articular fracture, if the joint surface recovery is not flat, long time joint activities and friction after surgery, it is easy to form traumatic arthritis in the late stage, with symptoms such as pain, swelling and limitation of joint activities in knee joint and lower limbs. If there is edema in the knee and lower limbs 5 months after the tibial plateau fracture surgery, it is recommended that the patient rests more and restricts the activities and weight bearing of the knee joint, so as not to aggravate the local edema.