The general survival time of lower extremity vein thrombosis depends on the location, size and duration of the thrombosis, so it is impossible to make a generalization. If it is a superficial vein thrombosis of the lower extremity, and in the early stage of formation, it is relatively easy to treat and has a high cure rate, and generally does not affect the patient’s life too much, and most patients can survive as long as normal after receiving treatment in the early stage. In the case of deep vein thrombosis in the lower extremities, the more serious cases may lead to swelling and other changes in the distal extremities, and the life expectancy of patients may be greatly affected. If the lower extremity vein thrombosis is not treated effectively, because the thrombus is easily dislodged, the dislodged thrombus may flow into the pulmonary artery with the venous blood, which may cause pulmonary infarction and even the risk of sudden death. Patients with lower extremity deep vein thrombosis can go to the vascular surgery department of the hospital in time, and the doctor will intervene according to the specific situation and give anticoagulation and thrombolysis treatment. If there are contraindications to anticoagulation, such as a recent cerebral hemorrhage, an active gastric ulcer and other underlying diseases, an inferior vena cava filter can be placed to prevent the fatal risk of pulmonary embolism.