After having lower extremity venous thrombosis, first of all, it is recommended to rest in bed, elevate the affected limbs, and use diuretics as appropriate to reduce the swelling of the limbs. If the condition permits, you can wear medical compression stockings or elastic bandages to get up and move around; you can take aspirin and other drugs to eliminate aggregation to reduce blood viscosity and prevent platelet aggregation; you can also apply warfarin and other drugs for anticoagulation, and you can use urokinase and so on for thrombolysis. In thrombolysis, attention should be paid to prevent bleeding complications. Some patients may also choose surgical treatment, and there are generally two types of surgery: thrombectomy and direct thrombolysis via catheter.