The risk period for thrombosis after surgery is about 2 to 7 days, depending on the patient’s condition. The main reason for the formation of blood clots after surgery is that blood coagulation increases after surgery and blood flow is relatively slow, which makes it easy to cause blood clots. The most serious problem of blood clots may lead to acute pulmonary embolism or deep vein blockage in the lower limbs, which may be life-threatening. Therefore, it is recommended to get out of bed as soon as possible after the surgery, do not stay in bed for too long, pay attention to early massage of the lower limbs to prevent the formation of deep vein thrombosis in the lower limbs, and for those who are at risk of thrombosis, oral anticoagulant drugs, such as dabigatran, rivaroxaban, etc., can be taken under the guidance of the doctor. For patients with thrombus formation after surgery, it is recommended to consult a vascular surgeon in the relevant department.