Lower extremity deep vein thrombosis requires thrombolysis and thrombolysis after filter implantation surgery. Lower extremity deep vein thrombosis is usually treated with surgical implantation of lower extremity venous filters to prevent dislodgment of blood clots from causing life-threatening pulmonary embolism. Prompt thrombolytic therapy is needed after implantation of the filter to prevent the clot from continuing to multiply, causing swelling of the limb and affecting arterial blood supply. Commonly used drugs include streptokinase, urokinase, tissue-type fibrinogen activator, etc., so that the fibrin in the thrombus is cleaved, which can dissolve the thrombus and vein recanalization, and relieve symptoms. If the symptoms of thrombus are severe, excessive swelling of the lower limbs and femoral bruising, it is recommended to remove the thrombus to restore the venous return of the lower limbs in time and reduce the edema. After considering deep vein thrombosis of the lower limbs, pay attention not to massage and squeeze with your hands to avoid dislodging the thrombus, go to the hospital in time, and thrombolytic therapy under the guidance of the doctor.