The cause of poor coagulation is related to decreased synthesis of coagulation factors and prothrombinogen. Decreased quantity leads to poor coagulation function. The reason for the decrease is usually related to abnormal liver function caused by diseases or systemic infections. 1. When there are liver diseases, such as hepatitis caused by viral infection, or cirrhosis caused by long-term chronic hepatitis, etc., the role of the liver in synthesizing coagulation factors will be affected, and due to the decrease in the synthesis of coagulation factors, which will lead to coagulation dysfunction. 2. When there is shock or serious systemic infection, it is easy to lead to disseminated intravascular coagulation, which will lead to massive consumption of coagulation factors in the body, resulting in coagulation dysfunction. 3. Certain hereditary diseases, such as hemophilia, are congenital coagulation dysfunction diseases, which will lead to abnormal coagulation function of the human body and bleeding from wounds. When the abnormal performance of coagulation dysfunction occurs, it is necessary to consult a doctor in time to find out the cause of the disease and treat it under the guidance of the doctor.