After the femoral neck head down type fracture surgery, six and a half months to walk on the ground, the occurrence of leg and foot swelling may be normal, is due to the lower extremity venous reflux is not smooth, muscle atrophy and other factors caused by, but there may be lower extremity deep vein thrombosis and other complications. 1. Poor venous return of the lower limbs: Usually patients will be in bed for a long time after the surgery. Due to long time in bed, or long time exercise, it will lead to poor venous return in the lower limbs of the patients, and the phenomenon of swelling of legs and feet after walking on the ground, which can be gradually recovered with proper rest and elevation of the limbs. Therefore, six and a half months after the operation, the swelling of legs and feet after walking on the ground is normal, and the patients need to insist on activities and exercise in normal times. 2. Muscle atrophy: because patients are bedridden for a long time, activity is reduced, muscle strength is weak, will lead to six and a half months after the operation, walking on the ground with swollen legs and feet, etc., generally normal, patients need to strengthen the muscle exercise of the lower limbs, conscious practice muscle contraction can be gradually returned to normal. 3. Deep vein thrombosis: after femoral neck fracture surgery, due to the damage of the vein wall, slow blood flow and other reasons, it is easy to occur deep vein thrombosis of the lower extremities, leg and foot swelling, accompanied by pain in the lower extremities, should be immediately braked lying down, and timely hospital examination to determine the cause of the disease and active treatment. After the femoral neck head down type fracture surgery, leg and foot swelling, such as after rest did not relieve, the patient should consult a doctor to clarify the diagnosis, so as not to delay the condition.