The main reason why blood can circulate normally in the normal human body without either thrombosis or bleeding is the presence of several factors in the body such as perfect hemostasis, coagulation, anticoagulation and fibrinolysis. Under the joint action of several factors, the normal circulation of blood in the blood vessels is ensured without any obstruction. Fibrinolysis is fibrinolysis, which means that after the formation of fibrinogen, it will activate the body’s fibrinolytic enzymes, which will gradually break down the formed fibrin clot into fibrinogen degradation products. This results in the gradual breakdown of the formed clot. Hyperfibrinolysis is the result of hyperfibrinolytic function due to various reasons. Hyperfibrinolysis is the result of excessive breakdown of fibrinogen and depletion of various coagulation factors, resulting in a series of bleeding symptoms.