Poor blood return means that the venous blood in the blood vessels does not return smoothly, allowing excess blood to be trapped in the peripheral circulation, which may lead to the development of lower extremity thrombosis, varicose veins of the great saphenous veins, and phlebitis of the lower extremities, which can result in the appearance of swelling in the distal extremities. Poor blood return is common in conditions such as lower extremity venous thrombosis, varicose veins of the great saphenous veins, and phlebitis of the lower extremity veins. Symptomatic treatment varies from disease to disease. 1. After lower extremity thrombosis, patients will have limb swelling, numbness, pain, etc. The best symptomatic treatment is to use thrombolytic drugs, such as: urokinase, heparin, etc., which can reduce the symptoms of poor reflux. 2. In case of varicose saphenous vein, surgical treatment is needed to make the blood return through collateral circulation, and the symptoms of varicose vein will be improved. 3. Phlebitis of the lower extremities: If the varicose veins for a long time can cause blood stagnation and damage to the endothelial lining of the Cao Zhi veins, which can lead to the formation of thrombus. It can lead to inflammatory reaction of the whole wall of superficial veins, and the localization can show pain, swelling and compression of cords and columns. If you find inexplicable swelling of the hands and feet, it is recommended to go to the hospital for timely consultation, vascular ultrasound can effectively determine whether there is poor blood reflux, the possibility of thrombosis, to avoid delaying the condition, affecting their own health.