Poor coagulation function may be caused by abnormalities in platelets, vascular walls, or a lack of coagulation factors.

1. Platelet abnormalities: Platelets can release substances that promote blood coagulation. When a patient's platelets show abnormalities, it can worsen coagulation function. Common diseases include platelet weakness, thrombocytopenic purpura, etc.

2. Abnormal vascular wall: When the permeability and fragility of the vascular wall are abnormal, it can hinder blood coagulation. Common diseases include allergic purpura, scurvy, etc.

3. Lack of coagulation factors: There are 12 types of coagulation factors in the normal human body. When patients lack coagulation factors, it can lead to poor coagulation function. Common diseases include severe liver disease, vitamin K deficiency, etc.

It is recommended that when patients experience poor coagulation function, they should promptly go to the hospital for examination and receive corresponding treatment under the guidance of a physician to avoid other complications caused by untimely treatment. During the treatment period, one should follow the doctor's advice and consume some protein foods in daily life, such as chicken, fish, shrimp, peaches, cashews, sesame, etc., which can improve fatigue and other symptoms caused by long-term bleeding.