In recent years, deep vein thrombosis has become a “fashionable disease” for young computer people. This is because the lower limbs are far away from the heart, sitting for a long time on the computer, keeping a motionless posture, the venous blood flow in the lower limbs is slowed down, easy to produce blood stagnation, and even venous blood is sometimes in an almost static state, thus easily inducing the formation of venous thrombosis. The early symptoms of computer thrombosis are spontaneous leg and stomach pain, swelling, localized fever, walking pain, and even the inability to walk. If the disorder is not treated in time, it can trigger lower extremity vein occlusion and destruction of venous valves, and lower extremity vein thrombosis dislodging and wandering to the lungs will potentially lead to fatal pulmonary embolism. The main symptoms of pulmonary embolism include dyspnea, chest tightness, chest pain, cough, blood in sputum, syncope, palpitations, etc. Some patients may experience pain and swelling in one or both limbs, and if not detected in time, the patient is likely to die suddenly. At present, the treatment mainly adopts intracavitary therapy of anticoagulation and thrombolysis under the protection of inferior vena cava filter, especially for “pulmonary embolism”, intracavitary surgery should be used in time to save life. Computer workers and computer fans who sit for a long time and move little should take the following preventive measures: dress and shoes and socks should be loose; when you sit in front of the computer or play online for 1 to 2 hours, you should stand up and exercise, do more calf and foot exercises, or run or jump, or do squatting and other actions to accelerate blood circulation in the lower limbs; drink more water, do not smoke; pay attention to not eating a high-fat, high-sugar, high-salt diet in daily life, and insist on a light and nutritious diet. The diet is light and rich in nutrition. In addition, for those who need to stand or sit for a long time (such as teachers, traffic police, office workers, etc.), wearing suitable medical elastic stockings can also play a good preventive role.