It is not possible to directly determine the exact time of dislodgement of venous thrombosis in the lower extremities, as the severity of the disease and the physical condition of the thrombus vary, and whether the thrombus is dislodged or dissolves and disappears is possible. Therefore, it is impossible to determine the time of dislodgement of lower extremity venous thrombosis. Venous thrombosis of the lower extremities is a disease in which the venous return of the lower extremities is impaired, leading to the formation of blood clots in these veins. The blood clots block the veins, causing impaired circulation in the lower extremities, swelling and pain. In the early stages of the disease or after strenuous exercise, the thrombus may become dislodged, and in severe cases, it can even cause a fatal pulmonary embolism. Patients should avoid strenuous exercise and should not massage or press on the limb to avoid dislodging the blood clot. Patients also need to be treated under a doctor’s supervision with oral anticoagulants such as warfarin and clopidogrel, intravenous heparin sodium injections, and recombinant streptokinase injections, which can dissolve the clot. If necessary, surgery is needed to remove the thrombus and help restore blood circulation in the lower extremity veins. If a patient develops a dislodged lower extremity venous thrombus, prompt treatment is needed. Medications should be applied under the direction of a physician.