Deep vein thrombosis refers to blood clotting in deep veins to form a thrombus, often occurring in the lower limbs, the newly formed iliofemoral vein fresh thrombus may fall off, with the venous blood back into the heart and pulmonary artery, resulting in pulmonary embolism, embolism can cause sudden death, so the prevention of deep vein thrombosis in the lower limbs is particularly important, how to prevent deep vein thrombosis in the lower limbs? The first step is to understand the risk factors of lower extremity DVT, and then take appropriate measures to prevent DVT by targeting these risk factors. If you are at risk for DVT, it is highly recommended that you take preventive measures (especially before traveling long distances of 4 hours or more). Left lower extremity DVT causes unilateral lower extremity swelling and thickening Lower extremity DVT dislodges leading to pulmonary embolism I. Risk factors for lower extremity DVT: People who are overweight, obese, or smokers are susceptible to DVT, so if you are overweight over-obese, or a smoker, please consider losing weight or quitting smoking; the likelihood of DVT is higher as you get older, so it is best for seniors over the age of 60 to take care of Find out if anyone in your family has had DVT, pulmonary embolism, or other blood clot problems in the past, and if so, the risk may be increased; some thrombophilic diseases also increase the risk of DVT, such as thrombophilia, antiphospholipid antibody syndrome, and erythrocytosis; and some diseases that can lead to hypercoagulability of the blood such as nephrotic syndrome and cancer. There are also diseases that predispose the blood to hypercoagulability, such as nephrotic syndrome and cancer. Certain medications such as hormones can also lead to blood clotting (especially estrogen). If you are pregnant, have just given birth, are taking oral contraceptives, or are receiving hormone replacement therapy, the level of these hormones will increase, and you will be in the high-risk group for DVT; other risk factors such as being sedentary, being bedridden for a long time, and traveling on an airplane for more than 4 hours. For high risk factors to take appropriate measures to prevent DVT: 1. Avoid prolonged sitting posture; if you need to sit for a long time because of your work: lift your toes and heels or move your ankle joints every half an hour to promote the contraction of calf muscles, and utilize the pumping action of calf muscles to promote the return of venous blood to the heart, which can reduce the pressure on the veins of the lower limbs, and prevent the formation of DVT in the lower limbs; 2. Wear loose and comfortable clothes, especially when traveling long distances, it is best to wear loose clothes, tight clothes (especially very tight pants) will lead to poor blood flow, increasing the possibility of thrombosis; 3, sitting authors in the break between jobs, when possible, you can take off your shoes, feet elevated, feet should be higher than the heart of more than 30 centimeters; from work back at home, you can lie down on your bed and put your feet on the wall to reach ninety degrees. After returning home from work, you can lie on the bed with your feet on the wall to reach ninety degrees (the same as inverted), and elevate them for more than 15 minutes, which can reduce the pressure of venous blood on the lower limbs, alleviate the symptoms of lower limb acidity, discomfort, edema, etc., and at the same time prevent the formation of deep vein thrombosis; if the conditions allow or after returning home from work, take off your shoes and walk barefoot or in loose slippers, which can improve the circulation of blood in the foot and make the foot muscles to be exercised to achieve the goal of preventing deep vein thrombosis. Drink plenty of water. Keeping your body well hydrated can reduce the risk of deep vein thrombosis, so drink plenty of water, especially if you are in a dry environment (e.g. airplane cabin); 5. Wear compression stockings during high-risk periods. Medical compression stockings, which have a higher pressure at the ankle than at the thigh, can increase the speed of blood flow and prevent deep vein thrombosis; take off the compression stockings when sleeping; 6. Please take off the compression stockings when you sleep; 6. For some hypercoagulable states or diseases such as prolonged bed rest after bone fracture, nephrotic syndrome or cancer, etc., it is necessary to apply low molecular heparin or oral anticoagulant medication (warfarin or berytto) to prevent DVT in the lower limbs under the guidance of the doctor.