If the elderly have lower extremity deep vein thrombosis, it is forbidden to use massage, acupuncture, massage, hot compresses and other related treatments, and if necessary, it is necessary to perform surgical treatments such as placing inferior vena cava filters, venous suction, and cannula thrombolysis. Lower extremity deep vein thrombosis is mainly associated with post-surgical braking, vascular injury, blood coagulation and stagnation and other factors, the elderly should also pay attention to exclude oncological diseases. The main clinical manifestations of lower extremity DVT are extensive swelling of the lower extremities, elevated skin temperature, dilated superficial veins and obvious depressed edema in the front of the shin, and in severe cases, even subcutaneous bruising, lowered skin temperature, and disappearance of arterial pulsations. If lower extremity DVT is suspected and there are no contraindications, anticoagulation therapy should be started immediately, and daily activities can be done, but strenuous exercise is not recommended to prevent venous thrombosis from dislodging, resulting in fatal pulmonary embolism. The treatment of lower extremity DVT is based on anticoagulation, and an inferior vena cava filter can be placed to prevent dislodgement of the venous thrombus.