Whether the lower extremity venous thrombosis can be recanalized after half a year should be decided in light of the severity of lower extremity venous thrombosis and the effect of anticoagulation therapy. If the venous thrombosis has been formed for six months, but the condition is relatively mild, and the effect of anticoagulation therapy is clearer, it can effectively prevent the formation of deep vein thrombosis in the lower limbs, in order to inhibit the spread of thrombus, and then the thrombus can also achieve the purpose of autolysis or lumen recanalization. However, the condition of some patients with lower extremity venous thrombosis will gradually progress after half a year, and thrombosis will gradually worsen, which may cause deep vein thrombosis in severe cases. The current antithrombotic treatment is ineffective and cannot control the spread of thrombus and thrombus mechanization, and ultimately autolysis or lumen recanalization may not be achieved. If you want to achieve recanalization, you need to know the severity of the disease and go to the hospital actively, improve the examination, understand the condition, and follow the doctor’s instructions, so as not to delay the disease and aggravate the venous thrombosis.