What causes bleeding disorders?
Bleeding disorders are caused by problems with any of the three processes needed for proper hemostasis, or blood clot formation. These processes are vasoconstriction (narrowing of blood vessels), platelet coagulation (platelets gathering together to form a plug), and clotting factor activity.
There are a wide variety of diseases, disorders and conditions that can cause bleeding disorders. Some of them are inherited (passed from parent to child through genes) and some are acquired.
Vascular (blood vessel) causes of bleeding disorders
Vascular problems that may cause bleeding disorders include:
Allergic purpura (thought to be an autoimmune disorder that makes blood vessels leaky)
Ehlers-Danlos syndrome (inherited disorder that makes blood vessels fragile and prone to injury)
Hemorrhagic telangiectasia (inherited disorder causing abnormalities in blood vessels and episodes of severe bleeding)
Platelet-related causes of bleeding disorders
Bleeding disorders can be caused by not having enough platelet cells or by having platelet cells that do not work properly. Platelet cells are vital to the clotting process. A low number of working platelets is called thrombocytopenia. Thrombocytopenia results in a platelet plug that is not complete.
Causes of thrombocytopenia include:
Blood cancers, including leukemia, lymphoma, and multiple myeloma
Bone marrow diseases
Chemotherapy and radiation therapy
HIV/AIDS (human immunodeficiency virus/acquired immunodeficiency syndrome)
Immune thrombocytopenic purpura (ITP; an autoimmune disorder that is also known as idiopathic thrombocytopenic purpura)
Inherited or genetic conditions
Medications, including aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), penicillin antibiotics, quinine, sulfa antibiotics, and gold salts
Splenic sequestration (pooling of platelets within the spleen)
Systemic lupus erythematosus (disorder in which the body attacks its own healthy cells and tissues)
Clotting factor-related causes of bleeding disorders
There are as many as 20 different proteins that function in your blood as clotting factors. Clotting factors undergo a complex process that results in the production of a substance called fibrin. Fibrin solidifies, or finishes the clot that was started by the platelet cells forming a plug. The clotting factors depend on each other to function properly. Bleeding disorders can be caused by a clotting factor deficiency.
Causes of clotting factor deficiency include:
Certain bacterial infections
Certain cancer treatments
Disseminated intravascular coagulation (DIC), which also reduces platelets in the blood
Fat malabsorption disorders
Hemophilia A (inherited deficiency of factor VIII)
Hemophilia B (inherited deficiency of factor IX that is also known as Christmas disease)
Medications, including warfarin (Coumadin), heparin, and certain cancer chemotherapies
Other inherited clotting factor deficiencies (factors II, V, VII, X, XII)
Vitamin K deficiency
von Willebrand’s disease (inherited disorder)
What are the risk factors for bleeding disorders?
A number of factors are thought to increase your chances of developing a bleeding disorder. However, the risks for developing a bleeding disorder are specific to each disorder. Common risk factors include:
- Family history of bleeding or bleeding disorder
- Male gender (hemophilia A and B)
- Poor nutrition
- Presence of other diseases, disorders or conditions known to cause bleeding disorders
- Use of anticoagulant medications including warfarin (Coumadin)
What are bleeding disorders?
Bleeding disorders are a group of abnormalities that lead to problems forming blood clots and prolonged bleeding that is hard to stop. Normally, blood flows through your body in vessels called arteries and veins. When a blood vessel is cut or injured, blood flows out, causing bruising and bleeding. Your body stops the ... Read more about bleeding disordersintroduction
What are the symptoms of bleeding disorders?
The primary symptom of bleeding disorders is prolonged or excessive bleeding. This can take many different forms in the body and depends on the specific bleeding disorder. Some signs of bleeding disorders can be found only during a medical examination or with special lab tests.
Bleeding can range in severity from a simple bruise to blood in the urine, stool, or sputum (mucus and p... Read more about bleeding disorderssymptoms
How are bleeding disorders treated?
Treatment for bleeding disorders begins with seeking medical care from your healthcare provider. To determine whether you have a bleeding disorder, your healthcare provider will likely draw blood samples for laboratory testing.
Specific treatments for bleeding disorders depend on the specific disorder. Treating the underlying disease, disorder or condition may improve bleeding. Tr... Read more about bleeding disorderstreatments