Lower extremity venous thrombosis leads to leg swelling, can lie in bed and elevate the affected limbs to promote lower extremity reflux, can also be under the guidance of the doctor for thrombolysis, anticoagulation and other treatments to relieve swelling. 1. Elevate the affected limbs: lower extremity venous thrombosis will block the venous blood vessels, resulting in poor reflux, the affected limbs can be elevated on the affected side of the lower limbs to promote venous reflux in the lower limbs, which can help to alleviate the swelling of the legs. 2. Thrombolysis: In the acute stage of lower extremity venous thrombosis, after the doctor evaluates the condition, interventional thrombolysis or cannula thrombolysis can remove the thrombus in a short period of time, help the veins to restore the smoothness and venous return, so as to alleviate the effect of leg swelling. 3. Anticoagulation: active anticoagulation treatment, the use of anticoagulant drugs under the guidance of doctors, such as clopidogrel, rivaroxaban, etc., according to the course of treatment, to prevent thrombosis aggravation, so that the small wall thrombus can be relieved, the blood vessels to restore smoothness, to achieve the effect of relieving the swelling of the legs. Lower extremity venous thrombosis, it is recommended to go to the hospital in time, under the guidance of the doctor for standardized treatment, to avoid aggravation of the condition.