1, closely observe the changes in the circumference and color of the affected limb: if the circumference of the affected limb is increasing, it means that the venous return is obstructed; the color deepens and the temperature rises, it means that there is infection, and the doctor should be notified in time and actively disposed of. 2.Elevate the affected limb: . Bed rest, elevate the affected limb slightly above the level of the heart to promote blood return, reduce the pressure in the superficial veins and make the pain less. In the acute stage, the patient is asked to rest in bed and elevate the affected limb by 30° to facilitate venous reflux and reduce edema. 3.Avoid collision injury to the limb: During the care process, the patient is advised to pay attention to safety and prevent from collision injury again. 4.Strengthen the protection of venous vessels: wear medical elastic stockings to promote blood reflux and prevent the sequelae of thrombosis. 5.The most serious complication of lower limb venous thrombosis is pulmonary embolism. If clinical care finds that the patient has cough, chest tightness, chest pain, blue lips, sputum with blood, etc., it should be paid great attention. In addition to closely observing the changes of the patient’s condition, the doctor should be informed of the situation in time.