Fibrinogen, also known as blood fibrinogen, is a protein required for blood clotting and is synthesized by liver cells. Low fibrinogen means that the body may be related to diffuse intravascular coagulation, serious liver disease, or congenital fibrinogen deficiency: I. Causes: 1. Diffuse intravascular coagulation: because of extensive coagulation of fibrin in the patient’s body, resulting in a large consumption of fibrinogen in the body, resulting in a low fibrinogen value; 2. Serious liver disease: such as cirrhosis, heavy hepatitis patients The fibrinogen value is low because the liver cell function is impaired and the synthesis of fibrin is reduced due to the disease; 3, congenital fibrinogen deficiency: it is a congenital disease, mostly caused by autosomal dominant or recessive inheritance. Second, the treatment: fibrinogen low patients should first actively treat the primary disease, while daily can eat more protein-rich food, such as eggs, milk, lamb soup, etc., can improve the problem of low fibrinogen. If the fibrinogen is low more, patients can be treated with cold precipitation infusion or fibrinogen injection. Third, precautions: fibrinogen is often used to assist in the diagnosis of diffuse intravascular coagulation, hereditary fibrinogen deficiency, liver disease development process, etc. It is recommended to go to the hospital in time to identify the cause of the disease and treat the cause.