D-dimer is a fibrin degradation product and is a test indicator for venous thrombosis, the value of which can change as the body’s condition changes. High D-dimer is commonly seen in disseminated intravascular coagulation, organ rejection, myocardial infarction, cerebral infarction, pulmonary embolism, post-thrombolytic therapy, etc. It usually reflects a hypercoagulable state of the body and is difficult to return to normal without treatment. It is difficult to return to normal values without treatment. Therefore, it is necessary to choose the appropriate treatment according to the specific situation: 1. If high D-dimer is detected, but thrombosis has not yet occurred, it is recommended to actively treat the primary disease under the guidance of doctors, and reasonably use anticoagulant drugs such as heparin, urokinase, warfarin and other anticoagulant drugs, which can accelerate the inactivation of thrombin and inhibit platelet activity to reduce the risk of coagulation; 2. Treatment, or interventional surgery to retrieve embolism, will reopen the blocked local blood vessels, which can prevent the thrombus from wandering, thus avoiding the thrombus from blocking important blood vessels and causing hemiplegia or even sudden death. In addition, it is considered that pregnant women will experience physiological elevation, so there is no need to worry too much and pay attention to regular review. In addition, patients with high D-dimer are advised to review regularly, try to eat a low-salt and low-fat diet, eat more vegetables and fruits, eat less fatty meat, and pay attention to quit smoking to avoid continuing to aggravate the symptoms of thrombosis. After thrombolytic treatment, avoid strenuous exercise or excessive massage to prevent the thrombus from dislodging and triggering pulmonary embolism, resulting in serious adverse consequences. If abnormalities such as limb numbness, movement and perception impairment occur after treatment, it is suspected that the thrombosis may recur, and it is recommended to go to the hospital for clear diagnosis in time.