The occurrence of lower extremity venous thrombosis needs to be treated in time, and the best time for healing should be within 6-8 hours of thrombus formation, the earlier the better. Lower extremity venous thrombosis is mainly caused by stagnant venous blood flow, damage to the venous wall, and hypercoagulation of blood, which causes obstruction of venous return and leads to edema in the lower extremities. Therefore, it is relatively easy to treat venous thrombosis when the patient develops it, but it is difficult to be detected in the early stage. In advanced stages, surgical treatment is required, but may not be able to completely remove the thrombus. Lower extremity venous thrombosis can be cured by various methods of thrombolysis, aspiration, and fragmentation to eliminate the thrombus at an early stage of formation or before it becomes mechanized. Thrombolysis is the most effective, which means that the best time to treat venous thrombosis is within 6-8 hours of thrombus formation. Beyond this time, only suction, fragmentation, surgery and other treatments can be taken, and the effect will be much lower. After the operation, you can also take some anticoagulants, such as warfarin, dabigatran, rivaroxaban, etc., to prevent and control the recurrence of thrombosis.