Fibrinogen is measured by immunoturbidimetric and prothrombin assays, with a normal value of 2 to 4 g/L. Above normal, the higher the value, the more serious it is. Fibrinogen is synthesized by the liver and is a kind of coagulation factor. Fibrinogen helps platelet aggregation, promotes smooth muscle growth and contraction, etc., accelerates blood viscosity, and speeds up red blood cell aggregation and thrombosis. Increased fibrinogen can be seen in infections, burns, tumors, hypertension, hyperlipidemia, tuberculosis, infectious myocarditis, sepsis and endocarditis. The higher the fibrinogen value, the more likely it is that thrombotic disease will occur. Accompanied by hyperlipidemia, it may trigger cerebral thrombosis, or cause the patient to develop coronary heart disease and angina pectoris. The increase of fibrinogen indicates that the organism is in a state of high coagulation, which is very easy to occur cardiovascular and cerebrovascular disease accidents, and needs to be vigilant, and should be consulted in time to find out the cause and give timely treatment.