D-dimer for 2000ug / L is obviously elevated, suggesting that the body has secondary hyperfibrinolysis, can be seen in pulmonary embolism, acute myocardial infarction, cerebral infarction and other thrombotic diseases, especially pulmonary embolism is the most obvious. D-dimer refers to D-dimer, which is the product of secondary hyperfibrinolysis, and D-dimer is often less than 200ug/L in normal people. D-dimer will increase with age, which is a physiological increase, so whether D-dimer is normal or not should be analyzed together with the patient’s age. In addition, gastric cancer, intestinal cancer, lymphoma, leukemia and other diseases can also lead to secondary elevation of D-dimer, thus increasing the risk of thrombotic diseases. It is recommended that patients with elevated D-dimer should consult a doctor in a timely manner and undergo a complete banana test in order to identify the specific cause of the disease and then treat the cause of the disease. If D-dimer is abnormally elevated, anticoagulation with drugs such as low molecular heparin sodium may be indicated after assessing the risk of bleeding.