Acute phase iliac vein thrombosis can not be dissolved may be because the thrombus is heavy, need to go to the hospital in time for surgical treatment, placement of inferior vena cava filters, feasible catheter thrombosis treatment, to prevent thrombus dislodgement and obstruction of the lungs, thus forming a pulmonary embolism, or obstruction of the cardiovascular, which can lead to heart attack. Acute phase iliac vein thrombosis is a common deep vein thrombosis of the lower extremities, usually caused by elevated lipids or overweight obesity, which may lead to symptoms such as localized swelling, numbness, pain, etc. If the thrombus is not treated in time, leading to dislodgement of the thrombus, it may lead to respiratory difficulties, coughing, chest tightness, etc., which may lead to shock in severe cases. Acute stage iliac vein thrombosis can use thrombolytic drugs, you can use atipase, reteplase and other drugs under the guidance of the doctor to dissolve the thrombus, if the dissolution can not be, it is necessary to place the inferior vena cava filter, surgical removal of thrombus, to prevent thrombus dislodgement. During the treatment period, we should pay attention to bed rest, pay attention to keep warm, quit smoking and drinking, eat more food with high vitamin content, and eat a light diet.