Taking aspirin is not recommended for surgery. The main effect of taking aspirin is anticoagulation. Many patients who have had heart attacks or strokes, as well as those who have had heart stent surgery, are told by their doctors to take aspirin for a long time, in order to prevent the formation of blood clots. Taking aspirin before surgery can lead to bleeding that does not clot during surgery and can be severe enough to cause death. It is recommended to stop taking aspirin for at least 5-7 days before surgery, then take blood tests to check the coagulation function, and proceed with the surgery when the coagulation function is normal. If bleeding is caused by taking aspirin during surgery, fresh platelet transfusions can be chosen to help stop the bleeding, along with the use of anticoagulant medications.