Taking aspirin must be stopped for 7 days before surgery in most cases. In contrast, patients can stop or discontinue aspirin for <7 days for minor and some emergency surgeries where the risk of blood clots is very high and the risk of bleeding is very low. Aspirin is an antiplatelet aggregating drug, and platelet aggregation is an important process of blood clotting. After discontinuing the drug for 7-10 days, newly produced platelets in the blood replace the platelets that have been inhibited in their ability to aggregate, thus restoring the ability to aggregate. In most cases, if aspirin is not stopped or is stopped for a short period of time (<7 days), there is a high risk of intraoperative bleeding, which may compromise the outcome of the procedure or even jeopardize the patient's life. However, for those with a high risk of thrombosis, such as recent heart attack, angina pectoris, or recent placement of a cardiac stent, surgical treatment is usually performed without aspirin. And for minor surgical procedures with a very low risk of bleeding, such as simple surgery of the skin, arthrocentesis, and gastrointestinal endoscopy without biopsy, it is possible to perform the procedure without stopping the use of aspirin. For some diseases (e.g., severe cholangitis), aspirin should be discontinued as soon as possible (usually <7 days) if the disease needs to be treated by emergency surgery. If the risk of bleeding is high, platelet transfusion and other hemostatic drugs are needed to control bleeding while closely monitoring coagulation parameters. Warm tips: the use of drugs and disease treatment should be carried out under the guidance of a professional doctor.