The prevention of blood clots mainly includes lifestyle intervention and drug prevention. Lifestyle interventions include low salt, low fat and low sugar diets, appropriate physical exercise to increase vascular elasticity, weight control, good work and rest habits, sleeping on time, not staying up late, and stopping smoking and drinking. Drug prevention mainly includes long-term oral aspirin antiplatelet aggregation, oral statins such as simvastatin, resevastatin and atorvastatin to regulate lipids and stabilize plaque, and active control of blood pressure and blood sugar. When blood pressure is elevated, oral amlodipine, irbesartan and amlodipine besylate can be taken to regulate blood pressure, so that blood pressure is stable and should not be high or low. When there is a history of diabetes, metformin is generally preferred orally, and if necessary, subcutaneous insulin can also be injected to lower glucose therapy. Drug prophylaxis is generally mainly applied to middle-aged and elderly people over 50 years old, and is generally given in advance if the patient has diabetes and hypertension.