Bleeding Disorders
What are bleeding disorders?

Bleeding disorders, also called bleeding diatheses, are conditions in which the mechanisms that stop bleeding do not work properly. They may involve platelets, clotting factors, or blood vessels. As a result, bleeding may occur without a clear cause, or it may be heavier and last longer than usual after an injury, surgery, or dental procedure.

How do bleeding disorders appear?

The main signs of abnormal bleeding include:

Petechiae and purpura: Red or purple spots beneath the skin that do not fade when pressed. Petechiae are very small, while purpura consists of larger spots.
Ecchymoses (bruises): Larger, flat, blue-purple areas caused by blood collecting beneath the skin. They are more significant when they are frequent or large, appear without a clear injury, or follow a very minor injury.
Nosebleeds (epistaxis): They may recur, last longer than usual, or be difficult to stop.
Bleeding gums (gingival bleeding): Bleeding may occur spontaneously or be heavier than expected while brushing or after dental treatment. It should be distinguished from bleeding caused solely by gum inflammation.
Very heavy or prolonged menstrual periods: These may involve large clots, the need to change pads or tampons very frequently, and signs of iron deficiency such as fatigue and pale skin.
Prolonged bleeding after wounds or procedures: Bleeding lasts longer than expected or starts again after it seemed to have stopped. This may happen after a cut, tooth extraction, surgery, or childbirth.
Hematomas and muscle bleeding: Deeper collections of blood that cause swelling, pain, and sometimes restricted movement. They are more typical of clotting factor deficiencies.
Bleeding into a joint (hemarthrosis): This causes pain, warmth, swelling, and difficulty moving the joint. Repeated episodes are particularly characteristic of hemophilia and can damage the joint.
Internal bleeding: Signs may include blood in the urine, black or bloody stools, vomiting blood, abdominal pain, or neurological symptoms. Internal bleeding can be serious and requires prompt evaluation.

📌 Important: Not every bruise indicates a disease. The assessment considers how often bleeding occurs, how long it lasts, how much blood is lost, where it occurs, the medicines a person takes, and their family history.

What causes bleeding disorders?

Causes vary by disorder. They may be inherited or acquired later in life.

Inherited causes

Von Willebrand disease: The most common inherited bleeding disorder. It affects von Willebrand factor and usually causes bleeding from the skin and mucous membranes.
Hemophilia A and B: These involve a deficiency of factor VIII and factor IX, respectively.
Deficiencies of other clotting factors: Factor XI or XIII deficiency, for example, are rare.
Platelet function disorders: Inherited defects in how platelets work.
Inherited blood vessel and connective tissue disorders: Examples include hereditary hemorrhagic telangiectasia and certain connective tissue disorders.

Acquired causes

Medicines: Anticoagulants, antiplatelet medicines such as aspirin, and some pain relievers can increase bleeding.
Thrombocytopenia: A low platelet count may be related to infections, autoimmune disease, medicines, bone marrow disease, or other causes.
Liver or kidney disease: These conditions may affect the production of clotting factors or platelet function.
Vitamin K deficiency: This affects the production of certain clotting factors and may be associated with prolonged antibiotic use or malabsorption.
Acquired factor inhibitors: Antibodies that block the action of a clotting factor.
Other conditions: Cancers, certain complications during or after pregnancy, connective tissue diseases, and excessive alcohol use.

When should you see a doctor?

Seek a medical evaluation if you have repeated or unusually heavy bleeding, frequent bruising without a clear cause, very heavy menstrual periods, anemia, or a family history of a bleeding disorder.

Seek immediate medical attention if you have:

Bleeding that does not stop with direct pressure after a cut or injury.
Vomiting blood, black stools, or visible blood in the urine or stool.
A sudden, severe headache, confusion, or weakness on one side of the body.
Marked, painful swelling of a joint or muscle.
Pronounced paleness, dizziness, or a rapid heartbeat after blood loss.

How are bleeding disorders diagnosed?

No single test detects every bleeding disorder. Diagnosis is built step by step, beginning with a medical history, physical examination, and laboratory tests.

Medical history: The doctor reviews bleeding episodes, family history, and the use of medicines or herbal products.
Physical examination: The doctor looks at the skin and other signs that may help identify the cause.

Initial tests

Complete blood count and peripheral blood smear: These assess hemoglobin, platelet count, and the appearance of blood cells.
PT/INR and aPTT: These assess clotting times and different parts of the coagulation process.
Fibrinogen: This measures a protein needed to form a clot.
Liver and kidney function tests: These help identify acquired causes.
Ferritin and iron studies: These may be requested when chronic blood loss is suspected.

Specialized tests

Depending on the initial results, further tests may include:

Von Willebrand factor antigen and activity tests, along with factor VIII activity.
Platelet function tests, such as aggregation studies or PFA-100.
Measurement of specific clotting factors.

📌 Even after an extensive evaluation, testing does not identify a cause in some people with a clear history of bleeding. Once other causes have been excluded, this may be classified as a bleeding disorder of unknown cause (BDUC).

How are bleeding disorders treated?

Treatment depends on the cause, the type of disorder, and the severity of bleeding. The goals are to stop bleeding, treat its cause, and prevent further episodes. Special precautions may also be needed before surgery or dental procedures.

Local measures: Direct pressure on the bleeding site and, when needed, other local treatments to stop the bleeding.
Medicines or clotting factors: Depending on the cause, treatment may involve medicines that help stop bleeding or replacement of a missing clotting factor.
Treatment of the underlying cause: The disease or condition responsible for the bleeding is addressed.
Prevention of episodes: People at risk may need preventive measures or treatment, particularly before surgery or dental procedures.

Caution: Tell your doctor about your bleeding disorder before any surgical or dental procedure. Do not start or stop medicines that affect clotting without medical advice.

What complications are possible?

If bleeding disorders are not diagnosed or treated in time, they may lead to:

Anemia from chronic blood loss, often accompanied by iron deficiency.
Severe bleeding after surgery, dental procedures, or childbirth.
Joint damage from repeated bleeding, particularly in hemophilia.
Life-threatening bleeding, such as bleeding inside the skull, in severe cases.

Can bleeding disorders be prevented?

Inherited disorders cannot be prevented, but appropriate steps can reduce the risk of bleeding and complications:

Always tell your doctor and dentist about your disorder before a procedure.
Do not start or stop medicines that affect clotting without medical guidance.
Carry a card or note with your diagnosis and medicines for emergencies.
Treat iron deficiency promptly and have blood tests according to your hematologist’s plan.
For inherited disorders, genetic counseling can help families understand the risk.
Avoid excessive alcohol consumption and look after your liver health.

Why do timely diagnosis and management matter?

An early hematology assessment helps identify the cause of bleeding, select appropriate treatment, and reduce the risk of complications. It is especially important before surgery or dental procedures, or when planning a pregnancy.

If you experience repeated or unusually heavy bleeding, speak with a doctor about an evaluation.

Frequently asked questions

Does every minor bruise mean I have a bleeding disorder?
No. Minor bruising is common and does not establish a diagnosis on its own. Heavy bleeding or bleeding that recurs without a clear cause is more concerning.

Are these disorders always inherited?
No. Some, such as hemophilia or von Willebrand disease, are inherited. Others develop later in life because of medicines or other medical conditions.

Can I have repeated bleeding even if my test results are normal?
Yes. In some people, test results remain normal even after a broader evaluation. Once other causes have been excluded, the condition may be classified as a bleeding disorder of unknown cause (BDUC), which requires specialist follow-up.

Can I safely have surgery or a dental procedure?
In many cases, yes. Tell the doctor and dentist about your bleeding history in advance. The necessary precautions depend on the disorder and the type of procedure.

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📌 Reviewed by Dr. Irma Lapaj, Hematologist, Klinika Kajo.

Bleeding Disorders