Swelling of the lower extremity limbs after surgery occurs in basically all patients with lower extremity fractures after surgery. Generally, it is necessary to improve the relevant examination to exclude the swelling of the limb caused by venous thrombosis, kidney, heart and other diseases. The treatment is to elevate the affected limb, put a pillow under the injured limb or use a special leg elevation pad, perform limb elevation, flex and extend the ankle joint as much as possible, and perform active muscle contraction activities of the lower limb to promote venous return and eliminate limb swelling as soon as possible. If the swelling persists and it is impossible to determine what causes it, it is recommended to go to a regular hospital and seek professional doctors for judgment and treatment so as not to delay the condition.