The initial symptoms of lower extremity venous embolism are swelling and pain in the lower extremities. If the patient is lying in bed for a long time, or the blood is in high coagulation state, the veins are prone to form blood clots, which will lead to lower extremity venous embolism. After the lower extremity vein embolism, the blood return of lower extremity vein will be blocked, the lower extremity will be bruised and swollen, the patient will feel the local distension, discomfort and heaviness of the lower extremity, especially after the activity, this is the main symptom of the early stage of lower extremity vein embolism. After the occurrence of thrombus in the veins of the lower extremities, it is necessary to go to the hospital for systematic treatment, the patient needs absolute bed rest, otherwise the thrombus may be dislodged, which can lead to pulmonary embolism, which can jeopardize the patient’s life, and it is necessary to anticoagulant treatment, improve blood circulation treatment, and sometimes it is necessary to thrombolytic and other treatments.