Bleeding Disorders
When the blood does not clot the way it should
Quick Facts
- Type: Blood (hematologic) conditions
- Key problem: Impaired blood clotting
- Common signs: Easy bruising, prolonged bleeding
- Examples: Hemophilia, von Willebrand disease
Overview
Bleeding disorders are a group of conditions in which the blood does not clot properly. Normal clotting depends on platelets (tiny blood cells that plug injuries) and clotting factors (proteins that work together to form a stable clot). When any part of this process is missing or not working, bleeding may last longer than normal or happen too easily.
Bleeding disorders range from mild, causing easy bruising or nosebleeds, to severe, causing bleeding into joints and muscles or dangerous internal bleeding. Some are inherited, such as hemophilia and von Willebrand disease, while others are acquired later in life. Many can be effectively managed with treatment, allowing people to live active lives.
Symptoms
Signs of a bleeding disorder include:
- Easy or excessive bruising
- Frequent or prolonged nosebleeds
- Heavy or prolonged menstrual periods
- Bleeding that takes a long time to stop after minor cuts, dental work, or surgery
- Blood in the urine or stool
- Bleeding into joints or muscles, causing pain and swelling (especially in hemophilia)
- Many small red or purple spots on the skin
Signs of serious bleeding, such as a severe headache, confusion, vomiting blood, black stools, or bleeding that will not stop, require emergency care.
Causes
Bleeding disorders fall into inherited and acquired types:
- Inherited disorders: Caused by a missing or faulty clotting factor or platelet problem present from birth, such as hemophilia or von Willebrand disease.
- Low or poorly functioning platelets: From immune conditions, certain medications, or bone marrow problems.
- Liver disease: The liver makes many clotting factors, so liver damage can impair clotting.
- Vitamin K deficiency: Vitamin K is needed to make several clotting factors.
- Medications: Blood thinners and some other drugs increase bleeding risk.
Risk Factors
- A family history of a bleeding disorder
- Liver disease
- Use of blood-thinning medications
- Certain autoimmune conditions
- Vitamin K deficiency or poor nutrition
- Some cancers or bone marrow disorders
Diagnosis
Diagnosis begins with a detailed history of bleeding and bruising, including family history, and a physical examination. Blood tests are central and may include a complete blood count (to check platelets), clotting tests that measure how long blood takes to clot, and tests that measure specific clotting factors.
If an inherited disorder is suspected, specialized testing can identify which clotting factor is affected. Identifying the exact type of bleeding disorder is important because treatments differ.
Treatment
Treatment depends on the specific disorder and its severity:
- Clotting factor replacement: For hemophilia and similar conditions, the missing factor can be given to prevent or stop bleeding.
- Medications: Drugs that help the body hold clots together or boost certain clotting proteins, used for some conditions including von Willebrand disease.
- Platelet treatments: For low platelet conditions, treatment of the underlying cause and, in some cases, platelet transfusions.
- Addressing the cause: Treating liver disease, correcting vitamin K deficiency, or adjusting medications.
- Supportive care: Avoiding medications that increase bleeding, and careful planning around surgery and dental work.
People with bleeding disorders often benefit from care at a specialized hemophilia or hematology center.
Prevention
Inherited bleeding disorders cannot be prevented, but bleeding episodes and complications can be reduced:
- Follow your treatment plan and any preventive (prophylactic) therapy
- Avoid medications that increase bleeding unless approved by your doctor
- Tell all healthcare and dental providers about your condition before procedures
- Wear protective gear during activities with injury risk and choose lower-risk activities as advised
- Consider genetic counseling if there is a family history
When to See a Doctor
See a doctor if you bruise very easily, have frequent nosebleeds, bleed for a long time after minor injuries or dental work, or have unusually heavy menstrual periods. A family history of bleeding problems is also a reason to be evaluated.
Seek emergency care immediately for bleeding that will not stop, signs of internal bleeding such as severe headache, confusion, vomiting blood, or black or bloody stools, or significant bleeding after a head injury. People with known severe bleeding disorders should have an emergency plan and seek care promptly after any serious injury.
Frequently Asked Questions
What causes a bleeding disorder?
Bleeding disorders happen when part of the clotting process is missing or not working. Some are inherited, such as hemophilia and von Willebrand disease. Others are acquired from liver disease, low platelets, vitamin K deficiency, blood-thinning medications, or certain other conditions.
What are common signs of a bleeding disorder?
Common signs include easy or excessive bruising, frequent or prolonged nosebleeds, heavy menstrual periods, and bleeding that takes a long time to stop after cuts, dental work, or surgery. Hemophilia can also cause bleeding into joints and muscles.
Can bleeding disorders be treated?
Yes. Many are managed effectively. Treatments include replacing missing clotting factors, medications that help blood clot, treating low platelets, and addressing underlying causes. Care at a specialized hematology or hemophilia center is often helpful.
When is bleeding an emergency?
Seek emergency care for bleeding that will not stop, significant bleeding after a head injury, or signs of internal bleeding such as severe headache, confusion, vomiting blood, or black or bloody stools. These situations need immediate medical attention.
Are bleeding disorders inherited?
Some are, such as hemophilia and von Willebrand disease, which are present from birth and can run in families. Others are acquired later in life from causes such as liver disease, medications, or immune conditions. Genetic counseling can help families with inherited types.
References
- National Heart, Lung, and Blood Institute (NHLBI). Bleeding Disorders.
- Centers for Disease Control and Prevention (CDC). Hemophilia and bleeding disorders.
- MedlinePlus, U.S. National Library of Medicine. Bleeding disorders.
- National Hemophilia Foundation.