After lower limb vein thrombosis must pay attention to the following points: First, avoid early bed activities, because the biggest risk of thrombosis is to dislodge and form pulmonary embolism, which can be accompanied by chest tightness and shortness of breath in mild cases, and respiratory arrest and death can occur suddenly in severe cases. So for the lower limb deep vein thrombosis, early bed activities should be avoided to squeeze the blood vessel. Second, for the lower limb deep vein thrombosis, avoid limb stimulation, massage or rubbing the limb to prevent the thrombus stimulation and then dislodge to form pulmonary artery embolism. Third, the limb can be elevated appropriately to promote reflux, using pressure circulation drive pump or lower limb elastic stockings, which can effectively improve the edema symptoms.