Excessive coagulation has a negative effect on the health of the body and increases the risk of thrombosis. Only moderate coagulation function is beneficial to health. 1. Excessive coagulation can be caused by a variety of reasons, usually shortened activated partial thromboplastin time and plasma plasminogen time, which can be seen in women taking oral contraceptives, thromboembolic disease, disseminated intravascular coagulation and hypercoagulable states. The main consequence of excessive coagulation is an increased risk of thrombotic diseases in the body. 2. Only moderate and normal coagulation is beneficial to health. The process of coagulation is essentially the transformation of soluble fibrinogen in plasma into insoluble fibrin. In general, plasma prothrombin time, activated partial thromboplastin time and other indicators to measure. Abnormal coagulation function can also be seen in other diseases, need to be combined with laboratory and imaging tests to clarify the diagnosis, it is recommended that patients go to the hospital in a timely manner, under the guidance of the physician consultation and treatment, in order to avoid delays in the condition.