Swelling of the foot plate after practicing knee flexion after a fracture is generally normal. After a knee fracture the activity is less compared to the normal leg, and the whole limb is lying down for a long time basically at the same level as the heart. After functional rehabilitation or when the leg starts to drop, it is normal to have edema due to the increase in venous return pressure as a result of adapting to the effect of gravity. The swelling will improve significantly after rest or when the training volume is reduced. Ice packs should be applied immediately after general rehabilitation to avoid swelling. In most cases, ice packs should be applied for 20 minutes at a time. Secondly, elevating the affected limb above the level of the heart at night can promote venous return and also relieve knee swelling. If the swelling of the foot plate of the knee joint after practicing knee flexion after fracture continues to aggravate without relief, you should consult a doctor in time to clarify the cause of the disease, and carry out treatment under the guidance of the doctor.