Bleeding Disorders

Medically Reviewed By William C. Lloyd III, MD, FACS

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 bleeding through a process called hemostasis. Hemostasis normally takes only a few minutes. Ineffective hemostatis leads to spontaneous bleeding and bleeding that will not stop.

Hemostasis includes three major steps that all need to function correctly in order to stop bleeding effectively. First, blood vessels need to constrict or narrow when they are damaged or cut. This is called vasoconstriction. Second, cells called platelets need to form a platelet plug at the site of the vessel injury. Third, a complex system of clotting factors is required to finish the clotting process. If any of these three components fail, or work only partially, your body is not able to make a proper blood clot. This results in prolonged bleeding.

Bleeding disorders can be caused by a wide variety of diseases, disorders and conditions. Some of these causes are hereditary (passed from parent to child through genes) and some are acquired. Inherited or hereditary causes of bleeding disorders include hemophilia and von Willebrand’s disease. Other causes of bleeding disorders may include autoimmune disorders, blood cancers, bone marrow problems, infections, kidney failure, liver disease, and medications.

Because of the wide variety of causes, the exact incidence of bleeding disorders in the United States is not known. Von Willebrand’s disease is the most common bleeding disorder in the United States, affecting approximately 1% to 2% of the population, according to the Hemophilia Federation of America (Source: HFA). Treatment of bleeding disorders depends on the specific disorder.

Bleeding disorders may cause uncontrolled internal or external bleeding. This can lead to serious or life-threatening complications, such as anemia, dangerous blood loss, and shock and damage to vital internal organs, such as the brain. Seek prompt medical care if you, or your child, have symptoms of a bleeding disorder, such as easy or excessive bruising after a minor injury, bleeding gums, nosebleeds, or heavy menstrual bleeding.

Seek immediate medical care (call 911) if you, or someone you are with, have serious symptoms, such as bleeding from a wound that does not stop after a few minutes, blood in the urine or stool, vomiting blood, major rectal bleeding, continued dizziness, or shortness of breath.

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 phlegm). Bleeding can occur from any body part, including the digestive tract, blood vessels, eyes, brain, and joints.

Common bleeding disorder symptoms include:

  • Anemia (low red blood cell count)

  • Bleeding gums

  • Bleeding into joints causing arthritis-like symptoms

  • Blood in semen

  • Dark, tarry bowel movements

  • Dark urine

  • Excessive or easy bruising

  • Heavy or prolonged bleeding from normal cuts and scrapes or minor dental procedures

  • Heavy or prolonged menstrual periods

  • Joint pain or stiffness

  • Nosebleeds

  • Prolonged postpartum bleeding (after childbirth)

  • Unusually pale skin and mucus membranes, such as in the mouth

  • Vision problems

Symptoms that might indicate a serious or life-threatening condition

In some cases, bleeding might indicate a serious or life-threatening condition that should be immediately evaluated in an emergency setting. Seek immediate medical care (call 911) if you, or someone you are with, have any of these life-threatening symptoms:

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

  • Kidney failure

  • Liver disease (includes any type of liver problem, such as hepatitis, cirrhosis, and liver failure)

  • 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:

  • Autoimmune disorders

  • 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)

  • Liver 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)

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. Treatment may include:

  • Antifibrinolytic medications, including aminocaproic acid (Amicar) and tranexamic acid (Cyklokapron), to help prevent the normal breakdown of blood clots after they have formed

  • Clotting factor replacement to replace a specific clotting factor

  • Corticosteroids, such as prednisone, to suppress the immune system in people who have developed antibodies that inhibit specific clotting factors (acquired hemophilia)

  • Desmopressin acetate (DDAVP), which is used to temporarily increase factor VIII clotting activity

  • Immune therapies to suppress the immune system in people with acquired hemophilia

  • Plasma transfusions to supplement all the clotting factors. Transfusion of fresh frozen plasma may be used after a bleeding episode or before certain procedures to control bleeding.

  • Platelet transfusions to increase the number of platelets in the bloodstream

  • Vitamin supplementation for bleeding disorders caused by vitamin K deficiency

What you can do to improve your bleeding disorder

In addition to following your healthcare provider’s instructions and taking all medications as prescribed, you can lessen the effects of bleeding disorders by:

  • Avoiding injury

  • Eat a balanced, nutritious diet

  • Having regular checkups with your healthcare provider. These checkups should include testing for blood-borne diseases.

  • Informing your dentist that you have a bleeding disorder so that he or she can take appropriate precautions to limit bleeding during procedures

  • Protecting your joints through regular exercise and maintaining a healthy weight

  • Receiving immunizations for hepatitis A and B

  • Seeking prompt treatment when bleeding occurs

What are the potential complications of bleeding disorders?

Complications of untreated or poorly controlled bleeding disorders can be serious and even life threatening. You can best treat your bleeding disorder and lower your risk of complications, or delay the development of complications, by following the treatment plan that you and your healthcare professional design specifically for you.

Over time, bleeding disorders can lead to serious complications including:

Was this helpful?
  1. Bleeding Disorders. Lab Tests Online.
  2. Bleeding Disorders. American Society of Hematology.
  3. Bleeding disorders. Medline Plus, a service of the National Library of Medicine National Institutes of Health.
  4. Excessive Bleeding. The Merck Manuals Online Medical Library.
  5. Overview of hemostasis. The Merck Manuals Online Medical Library.
  6. Platelet Count. Lab Tests Online.
  7. What is a Bleeding Disorder? National Hemophilia Foundation.
  8. Holme, P.A. and Tjonnfjord, G.E. Management of Acquired Hemophilia: A Literature Review. Journal of Coagulation Disorders. Jan 2010.
  9. Tierney LM Jr., Saint S, Whooley MA (Eds.) Current Essentials of Medicine (4th ed.). New York: McGraw-Hill, 2011.
Medical Reviewer: William C. Lloyd III, MD, FACS
Last Review Date: 2021 Jan 18
View All Blood Conditions Articles
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Never ignore professional medical advice in seeking treatment because of something you have read on the site. If you think you may have a medical emergency, immediately call your doctor or dial 911.