High plasma fibrinogen degradation products indicate that the body has hyperfibrinolysis, mostly seen in hematologic diseases, but also seen in infections, and so on. 1. Hyperfibrinolysis is divided into primary hyperfibrinolysis and secondary hyperfibrinolysis. (1) Acute promyelocytic leukemia is the main disease leading to primary hyperfibrinolysis. (2) Hypercoagulability of blood, disseminated intravascular coagulation, pulmonary embolism, deep vein thrombosis, malignant tumors, etc. often lead to secondary hyperfibrinolysis. 2. In addition, high fibrinogen degradation products may also occur when the body’s resistance is lowered or when bacterial infections occur. Therefore, when this test index is found to be abnormal, there is no need to worry too much, but must go to the hospital for further examination, clear diagnosis before treatment, so as not to delay the condition.